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Muscle & strength · Daily shot

Tesamorelin

FDA approved

–15.2% visceral fat

FDA Approved · 26 weeks · on 2 mg daily · a trial of 412 HIV-infected adults · Falutz 2007

Bottom line

Real drug, real label. Off-label use borrows from the HIV data.

Also called
  • Egrifta
  • Egrifta SV
  • Egrifta WR
  • TH9507
  • [trans-3-hexenoyl]-hGHRH(1-44)-NH2
  • Theratechnologies
Category
Peptide — FDA-Approved GHRH Analog (Visceral Adiposity)
Molecular Weight
5,135.9 Da
Sequence
44 aa + trans-3-hexenoic acid (N-term)
Half-life
~26 min (SC)
Route (studied)
SubQ (people)
Route (sold)
SubQ vials (Egrifta SV, Egrifta WR); vials (compounded)
FDA Status
Approved (2010)
Pipeline
  • Phase 2 after peripheral nerve injury (Johns Hopkins) (NCT03150511), primary completion est. Dec 2027
  • Phase 2 with exercise in HIV (Massachusetts General) (NCT06554717), primary completion est. Jun 2028
Indication
HIV lipodystrophy
Human Trials
Multiple Phase 3 + extensions
Pregnancy
Category X
Evidence Strength
Human: Strong
(Registration + post-marketing)
Cost & Access
Brand Rx / 503A compounded

Also for muscle & strength

The other four questions

What does it do? Tells the pituitary to release growth hormone in its natural pulses (EGRIFTA SV label). After six months: belly (visceral) fat is about 15% lower than on placebo, fat under the skin barely moves and triglycerides fall (Falutz et al., 2010, JCEM); in people with HIV and fatty liver, liver fat fell over a year (Stanley et al., 2019).
Who uses it? HIV-lipodystrophy clinics on-label. Off-label: longevity, hormone and weight-loss clinics, which offer it for belly fat and body composition.
Does the evidence hold up? For HIV-associated fat, yes. The 2007 Phase 3 trial in 412 patients was pivotal (Falutz et al., 2007). A 2019 trial in people with HIV and fatty liver added liver-biopsy data (Stanley et al., 2019). Outside HIV-lipodystrophy, the off-label use rests on limited data (Spooner & Olin, 2012).
Bottom line? Real drug, real label. Off-label use borrows from the HIV data.

Dosing from the Literature

Published for belly fat: the label doses for HIV-related belly fat. Not published: an approved dose for people without HIV.

Each dose below names its source: an FDA label, a published trial or, once, online bodybuilding protocols. Tesamorelin is prescription-only in the United States (EGRIFTA SV label).

IndicationDoseRoute / TimingNotes
HIV lipodystrophy (FDA label)1.4 mg SC once daily (Egrifta SV); 1.28 mg once daily (Egrifta WR); 2 mg once daily on the original EgriftaSubcutaneous injection into the abdomen; the labels set no time of dayFDA labels (Egrifta SV and Egrifta WR, 2026; original Egrifta, 2019): adults with HIV and lipodystrophy who have excess abdominal fat. The labels give no lower dose; they advise considering stopping if IGF-1 stays high (for example above 3 SDS), particularly if the response is not robust.
Off-label visceral fat reduction2 mg SC once dailySubcutaneous, once dailyTrial: 2 mg daily for 12 months in 60 adults with abdominal obesity and reduced GH secretion (Makimura et al., 2012). A 2026 review reports the same 2 mg daily dose in online bodybuilding protocols (Dominikowski et al., 2026). No FDA indication; off-label.
Off-label NAFLD / MASH2 mg SC once dailySubcutaneous, once dailyTrial: 2 mg daily for 12 months in 61 adults with HIV and a liver fat fraction of 5% or more; its protocol set a cut to 1 mg if the IGF-1 Z-score reached 3, which no participant needed (Stanley et al., 2019). No FDA indication; off-label.
Off-label cognition1 mg SC once daily30 minutes before bedtime, as in the trialTrial: 1 mg nightly for 20 weeks in 152 adults aged 55–87, 66 of them with mild cognitive impairment; IGF-1 rose 117% (Baker et al., 2012). No FDA indication; off-label.
DurationThe labels set none; the trials above ran 20 weeks to 12 months—Trials: visceral fat came back after people switched to placebo at 26 weeks; the effect lasted only as long as treatment (Falutz et al., 2008).
Continuing (VAT indication)——The labels advise weighing the risks and benefits of continuing in people whose visceral fat has not gone down (EGRIFTA SV label). In the Phase 3 trials, a fall of 8% or more at 26 weeks was defined in advance as a response; responders had larger falls in triglycerides and better-kept glucose control than non-responders over 52 weeks (Stanley et al., 2012).
Dosing Disclaimer

Tesamorelin is a prescription medication. Off-label use for non-HIV populations extrapolates mostly from HIV-lipodystrophy trial data, which may not generalize. The labels call for monitoring IGF-1 during treatment (EGRIFTA SV label). Always work with a licensed clinician.

→ Calculator — vial-to-syringe math

What It Is

Tesamorelin is a synthetic analog of human growth-hormone-releasing hormone (hGHRH) consisting of the full native 44-amino-acid GHRH (the signal that tells the pituitary to release GH) sequence with a trans-3-hexenoic acid moiety conjugated to the α-amino group of the N-terminal tyrosine residue (EGRIFTA SV label; Baker et al., 2012). The added chain was designed to resist dipeptidyl peptidase-4 (DPP-4), the serum enzyme that rapidly breaks down native GHRH (Bedimo, 2011), and tesamorelin still binds and stimulates the human GHRH receptor with potency similar to the body's own GHRH in vitro (EGRIFTA SV label). The drug was developed by Theratechnologies Inc. (Montreal) under the code TH9507 and is marketed in the US as Egrifta (and the 2019 reformulation Egrifta SV).

Tesamorelin is the only FDA-approved GHRH analog for an adult metabolic indication. The FDA granted approval on November 10, 2010, for the reduction of excess visceral adipose tissue (VAT) in HIV-infected adults with antiretroviral therapy-associated lipodystrophy. The approval was based on two Phase 3 placebo-controlled trials (Falutz 2007 NEJM, Falutz 2008 AIDS, Falutz 2010 JAIDS) showing visceral-fat reductions of 15.2% and 10.9% at 26 weeks with daily 2 mg SC dosing, with improvements in triglycerides and other metabolic markers and a generally acceptable safety profile.

Unlike CJC-1295 (whose N-terminal protection relies on the D-Ala2 substitution) and Modified GRF (1-29) (a truncated 29-aa backbone), tesamorelin preserves the complete native hGHRH(1-44) sequence. This is the reason tesamorelin is often described as the "most native" GHRH analog — the receptor engagement is maximally physiologic; only the N-terminal fatty-acid protection group is non-native. Half-life remains short (26 minutes in healthy adults and 38 minutes in HIV-infected patients on the original product, 8–11 minutes after single doses of the current ones; original EGRIFTA, EGRIFTA SV and EGRIFTA WR labels), so the pharmacodynamic effect is pulsatile GH release rather than a sustained plateau.

Mechanism of Action

Tesamorelin acts on the pituitary's GHRH receptor, which it binds and stimulates in vitro with potency similar to the body's own GHRH (EGRIFTA SV label); its added chain protects it from breakdown (Bedimo, 2011). In the trials it caused no clinically significant change in other pituitary hormones such as TSH, LH, ACTH or prolactin (EGRIFTA SV label).

  • GHRH receptor (pituitary somatotropes) — Tesamorelin carries the full 44-amino-acid sequence of human GHRH and, in vitro, binds and stimulates the human GHRH receptor with potency similar to the body's own GHRH. GHRH acts on the pituitary's somatotroph cells to stimulate the synthesis and pulsatile release of growth hormone (EGRIFTA SV label).
  • DPP-4 resistance via N-terminal acylation — Native GHRH is rapidly broken down in the blood by the enzyme DPP-4; tesamorelin's added hydrophobic chain was designed to resist it (Bedimo, 2011). The chain is a trans-3-hexenoyl group on the N-terminal tyrosine (Baker et al., 2012), and receptor potency stays similar to native GHRH in vitro (EGRIFTA SV label). Its elimination half-life after injection under the skin was 26 minutes in healthy adults and 38 minutes in people with HIV on the original 2 mg product (original EGRIFTA label), and 8–11 minutes after single doses of Egrifta SV or WR in healthy adults (EGRIFTA SV and EGRIFTA WR labels).
  • Endogenous pulsatile GH release — The cognition-trial authors describe GHRH treatment as producing a natural pulsatile GH release, rather than the prolonged rise that follows GH injections, and as keeping the normal negative feedback of IGF-1 on GH (Baker et al., 2012). Tesamorelin raises GH and, after it, IGF-1 and IGFBP-3 (EGRIFTA SV label).
  • IGF-1 elevation (pharmacodynamic marker) — IGF-1 rose 81% over 26 weeks on 2 mg daily in the first Phase 3 trial (Falutz et al., 2007) and 117% over 20 weeks on 1 mg daily in older adults (Baker et al., 2012). The labels call for monitoring IGF-1 during treatment and for considering stopping if it stays high (for example above 3 SDS), particularly if the response is not robust (EGRIFTA SV label).
  • Visceral fat reduction (downstream of GH lipolysis) — The effect behind its FDA approval; growth hormone is lipolytic, breaking down fat (EGRIFTA SV label). In the pooled Phase 3 trials, visceral fat fell 15.4% more than on placebo over 26 weeks, while abdominal fat under the skin did not change significantly (Falutz et al., 2010, JCEM). The two trials' own results were −15.2% and −10.9% at 26 weeks (Falutz et al., 2007; Falutz et al., 2010, JAIDS), and about −18% at 52 weeks in those kept on it (Falutz et al., 2008).
  • Liver fat (MASH/NAFLD context) — In the Stanley et al. 2019 Lancet HIV trial, tesamorelin reduced hepatic fat fraction by 4.1% absolute (37% relative) compared with placebo in HIV-infected adults with NAFLD, and fewer showed fibrosis progression on biopsy (10.5% vs 37.5%). The mechanism is unknown (Stanley et al., 2014); in that 6-month trial the fall in liver fat tracked the fall in visceral fat. Fourman and colleagues propose two routes: visceral fat drains to the liver through the portal vein, and growth hormone lowers the liver's de novo lipogenesis in HIV (Fourman et al., 2017).
  • Cognition (Baker 2012) — In healthy older adults and adults with amnestic mild cognitive impairment, 20 weeks of 1 mg/day tesamorelin improved executive function, with a non-significant trend for verbal memory. The authors note that GHRH, growth hormone and IGF-1 act on the brain and decline with age (Baker et al., 2012).
  • Lipid profile — In the pooled Phase 3 trials, triglycerides fell 12.3% more than on placebo over 26 weeks, and the total-to-HDL cholesterol ratio 7.2% more; non-HDL cholesterol was 7 mg/dL below baseline at 52 weeks in those kept on it (Falutz et al., 2010, JCEM). In the first trial, total and HDL cholesterol also improved (Falutz et al., 2007).

What the Research Shows

The HIV-lipodystrophy Phase 3 program enrolled 806 patients in two trials (Falutz et al., 2010, JCEM). Later trials tested tesamorelin on liver fat in people with HIV (Stanley et al., 2014; Stanley et al., 2019) and on cognition in older adults (Baker et al., 2012).

  • Phase 3 — Falutz 2007 NEJM — 412 HIV-infected adults (86% male) with abdominal fat accumulation randomized 2:1 to tesamorelin 2 mg SC daily or placebo for 26 weeks. Primary endpoint (% change in VAT by CT): –15.2% tesamorelin vs +5.0% placebo (between-group difference −20.2%, p < 0.001). Triglycerides fell 50 mg/dL, against a 9 mg/dL rise on placebo. IGF-1 rose ~81%. Glycemic measures preserved (N Engl J Med 357:2359-2370).
  • Phase 3 — Falutz 2008 AIDS (extension) — 6-month extension of original trial. 154 patients on tesamorelin for 52 weeks; sustained VAT reduction in treatment-continued group, reversion toward baseline in tesamorelin-to-placebo crossover group. No new safety signals (AIDS 22:1719-1728).
  • Phase 3 — Falutz 2010 JAIDS (second trial) — 404 patients randomized 2:1 to tesamorelin 2 mg SC daily or placebo for 6 months, then a 6-month extension. VAT fell 10.9% on tesamorelin vs 0.6% on placebo in the efficacy phase (P < 0.0001) (J Acquir Immune Defic Syndr 53:311-322).
  • Phase 3 — Falutz 2010 JCEM (pooled) — Pooled analysis of the two pivotal trials (806 patients). Treatment effect on VAT −15.4% at week 26, and VAT −17.5% at week 52 in patients kept on tesamorelin; triglycerides −12.3% vs placebo; better patient- and physician-rated belly profile. No clinically meaningful differences in glucose parameters; generally well tolerated (J Clin Endocrinol Metab 95:4291-4304).
  • Metabolic responder analysis — Stanley 2012 CID — Among tesamorelin-treated patients, those achieving ≥8% VAT reduction (responders) had significantly improved triglycerides, adiponectin, and preserved glucose homeostasis over 52 weeks, whereas non-responders had worsened glucose. The 8% cut-off was set in advance in the trials' analysis plan (Clin Infect Dis 54:1642-1651); the labels advise weighing the risks and benefits of continuing in people whose visceral fat has not gone down (EGRIFTA SV label).
  • Liver fat — Stanley 2014 JAMA — Randomized trial of tesamorelin vs placebo in HIV-infected adults with abdominal fat accumulation. Liver fat by MR spectroscopy declined significantly with tesamorelin, a net −2.9% in lipid-to-water percentage over 6 months. The fall in liver fat tracked the fall in visceral fat, independent of weight change; the authors call the mechanism unknown.
  • NAFLD histology — Stanley 2019 Lancet HIV — 61 HIV-infected adults with hepatic fat fraction ≥5% by proton MRS, randomized to tesamorelin 2 mg SC daily or placebo for 12 months. Primary endpoint (absolute change in HFF): −4.7% on tesamorelin vs 0.0% on placebo, a treatment effect of −4.1 percentage points (p = 0.018), or −37% relative. On repeat biopsy, fibrosis progressed in 10.5% on tesamorelin vs 37.5% on placebo (p = 0.04); the NAFLD Activity Score did not change significantly. Direct histologic evidence of hepatic benefit (Lancet HIV 6:e821-e830).
  • Cognition — Baker 2012 Arch Neurol — 20-week placebo-controlled trial of tesamorelin 1 mg SC nightly in 76 healthy older adults and 61 adults with amnestic MCI. Tesamorelin improved executive function in both groups and attenuated the expected cognitive decline in the MCI cohort. An exploratory analysis after a 10-week washout suggested a lingering benefit for executive function (P = .08) but not for verbal memory (Arch Neurol 69:1420-1429).
  • Inflammatory markers — Stanley 2011 — Tesamorelin lowered tPA antigen more than placebo, while CRP and PAI-1 did not change significantly; among treated patients, changes in PAI-1, tPA and adiponectin tracked the change in visceral fat.
  • Liver enzymes — Fourman 2017 — Among trial patients with raised baseline ALT or AST, VAT responders on tesamorelin had larger falls in ALT and AST over 26 weeks than non-responders. Liver fat was not measured; the authors suggest the change may reflect less fat in the liver.
  • Post-marketing LiverTox assessment — Pooled analysis of 816 HIV-infected patients treated for up to 52 weeks found no signal for clinically apparent hepatotoxicity. No DILI cases were attributed to tesamorelin in the NIDDK drug-induced liver injury network prospective cohort (2004–2013).
Critical Context — Evidence Strengths and Limits

Tesamorelin's evidence base is genuinely strong — an FDA-registered indication, replicated Phase 3 visceral-fat effect, independently conducted liver-fat and NAFLD trials, and published cognition data. The limits: the core data is almost all in HIV-lipodystrophy populations on chronic antiretroviral therapy; non-HIV obesity, MASH in the general population, and head-to-head comparisons vs tirzepatide / GLP-1-class agents for visceral adiposity reduction have not been adequately studied. Off-label use in the aesthetic/anti-aging space extrapolates from HIV data to metabolically healthy adults — which may or may not hold.

Human Data

Summary of the human evidence base:

  • Phase 1 PK/PD (Koutkia et al. 2004 JAMA) — Early randomized placebo-controlled GHRH work in HIV-infected men with lipodystrophy established the GH-axis response and motivated the TH9507 development program (JAMA 292:210-218).
  • Phase 2 — Falutz 2005 AIDS — Dose-ranging study (1, 2 mg daily) established the 2 mg dose selection (AIDS 19:1279-1287).
  • Phase 3 registration trials — Two placebo-controlled trials in HIV-infected adults with abdominal fat accumulation: NCT00123253 (412 patients; Falutz 2007 NEJM) and a second trial of 404 patients (Falutz 2010 JAIDS), each a 26-week efficacy phase followed by a 26-week extension. Their pooled analysis covers 806 patients (Falutz 2010 JCEM). Consistent VAT and triglyceride effects.
  • Liver-fat / NAFLD trials — NCT01263717 (Stanley 2014 JAMA), NCT02196831 (Stanley 2019 Lancet HIV NAFLD histology).
  • Cognition trial — NCT00257712 (Baker 2012 Arch Neurol, N = 137).
  • Pharmacokinetics — Tmax ~0.15 h SC; half-life 26 min in healthy adults and 38 min in HIV-infected patients after 14 days of 2 mg on the original product (original EGRIFTA label), and 8–11 min after a single dose of Egrifta SV or WR in healthy adults (EGRIFTA SV and EGRIFTA WR labels); steady-state IGF-1 reached at ~2 weeks; exposure roughly linear with dose across 1–2 mg range.
  • Long-term (52 week) extension data — Multiple Theratechnologies-sponsored extensions plus the Stanley 2012 / 2019 academic trials provide ~12 months of continuous-use safety data in HIV cohorts.

Reconstitution & Storage

The branded products are supplied as lyophilized powder with their own diluent: Egrifta SV in a 2 mg single-dose vial with sterile water for injection, Egrifta WR in an 11.6 mg vial with bacteriostatic water (EGRIFTA SV and EGRIFTA WR labels). The last two rows are arithmetic only, at example vial sizes and volumes: no label or document read for this page gives a vial size or mixing volume for compounded tesamorelin.

ProductPresentationReconstitutionConcentrationDose per unit
Egrifta SV (branded)2 mg lyophilized, single-dose vialReconstituted with 0.5 mL of the supplied sterile water4 mg/mL (2 mg per 0.5 mL)1.4 mg = 0.35 mL, injected immediately; the rest is discarded (EGRIFTA SV label)
Egrifta WR (branded)11.6 mg lyophilized, single-patient-use vialReconstituted with 1.3 mL of the supplied bacteriostatic water8 mg/mL1.28 mg = 0.16 mL once daily; one vial lasts 7 days at room temperature (EGRIFTA WR label)
Egrifta (original)1 mg lyophilized vials, two per 2 mg doseFirst vial reconstituted with 2.2 mL of the supplied sterile water, which then dissolves the second vial~1 mg/mL2 mg = 2 mL, injected immediately; the rest is discarded (original EGRIFTA label)
5 mg vial (arithmetic example)5 mg lyophilizedExample: 2.5 mL BAC water = 2,000 mcg/mL2,000 mcg/mL1 mg = 50 units (0.5 mL); 2 mg = 100 units (1.0 mL)
10 mg vial (arithmetic example)10 mg lyophilizedExample: 2 mL BAC water = 5,000 mcg/mL5,000 mcg/mL1 mg = 20 units (0.2 mL); 2 mg = 40 units (0.4 mL)
  • Reconstitution — The Egrifta SV instructions describe pushing the water slowly down the inside wall of the vial, with the needle at a slight angle, then rolling the vial gently in the hands for 30 seconds without shaking; Egrifta WR is swirled, not shaken. Both labels describe the mixed solution as clear and colorless (EGRIFTA SV and EGRIFTA WR labels).
  • Storage — Egrifta SV 2 mg vials, before reconstitution: room temperature, 20–25°C (68–77°F), with excursions to 15–30°C permitted, kept in the original box to protect from light (EGRIFTA SV label, section 16). The Egrifta SV label calls for using reconstituted solution immediately and discarding the rest; it says not to refrigerate or freeze it. Egrifta WR vials are also kept at 20–25°C before mixing; once mixed, a vial stays at room temperature, is neither refrigerated nor frozen, and is discarded 7 days later (EGRIFTA WR label). The original 1 mg Egrifta vials were refrigerated at 2–8°C (original EGRIFTA label). No document read for this page gives storage for compounded vials.
  • Injection site — The labels describe injecting into the abdomen, at least 2 inches (5 cm) from the navel and not into scar tissue or bruises, and changing the site with each dose to lower the risk of injection-site reactions (EGRIFTA SV and EGRIFTA WR labels).
  • Needle — Egrifta SV comes with 1-inch 20-gauge needles for mixing and ½-inch 30-gauge needles for injecting; Egrifta WR comes with syringes that have the needle attached (EGRIFTA SV and EGRIFTA WR labels).
  • Inspection — The labels say to use the solution only if it is clear and colorless, without particles (EGRIFTA SV and EGRIFTA WR labels).

→ Calculator — vial-to-syringe math

Side Effects & Risks

Important

The labels' side-effect data come from the registration trials. They tie joint pain, swelling and carpal tunnel symptoms to the growth hormone the drug releases, and warn of glucose intolerance (EGRIFTA SV label). What this means for a given person is a question for a licensed healthcare provider.

Tesamorelin's FDA labels list the adverse reactions seen in the Phase 3 program: 740 people with HIV were treated in the trials, 543 of them in the 26-week placebo-controlled phase, for up to 52 weeks in all (EGRIFTA SV label).

  • Injection site reactions (most common) — In the first 26 weeks of the trials, 25% on tesamorelin vs 14% on placebo had injection-site reactions, such as redness, itching, pain, irritation or bruising; the labels advise rotating sites across the abdomen to lower the risk (EGRIFTA SV label). In the 2019 fatty-liver trial, none of the injection-site complaints was judged serious (Stanley et al., 2019).
  • Arthralgia and myalgia — In the first 26 weeks, joint pain was reported by 13% on tesamorelin vs 11% on placebo, muscle pain by 6% vs 2%, and pain in the arms or legs by 6% vs 5%. The label ties joint pain to fluid retention caused by the growth hormone the drug releases (EGRIFTA SV label).
  • Peripheral edema — Reported by 6% on tesamorelin vs 2% on placebo in the first 26 weeks, and carpal tunnel syndrome by 1% vs none. The label describes these fluid-retention effects as either passing or resolving when treatment stops (EGRIFTA SV label).
  • Paresthesias / hypoesthesias — Tingling was reported by 5% on tesamorelin vs 2% on placebo in the first 26 weeks, and numbness by 4% vs 2% (EGRIFTA SV label).
  • Hyperglycemia / glucose intolerance — The labels warn that tesamorelin can cause glucose intolerance: by week 26, HbA1c reached 6.5% or more in 5% on tesamorelin vs 1% on placebo, a higher risk of diabetes (hazard ratio 3.3). They call for checking glucose status before starting and periodically during treatment (EGRIFTA SV label). In the Phase 3 trials, fasting glucose and HbA1c rose more in people whose visceral fat fell less than 8% than in those whose fell more (Stanley et al., 2012); in a smaller trial, fasting glucose rose at 2 weeks but not significantly over 6 months (Stanley et al., 2014).
  • IGF-1 elevation — In the first Phase 3 trial, IGF-1 rose 81% over 26 weeks (Falutz et al., 2007). The labels say the effects of prolonged IGF-1 elevation are unknown, and call for monitoring IGF-1 and for considering stopping if it stays high (for example above 3 SDS), particularly if the response is not robust (EGRIFTA SV label).
  • Hypersensitivity — Hypersensitivity reactions occurred in 4% of trial patients: itching, redness, flushing, hives and rash. The labels say to stop treatment and seek prompt medical attention if one is suspected (EGRIFTA SV label).
  • Fluid retention / weight — The labels call tesamorelin weight neutral: over 26 weeks, body weight changed by −0.4 kg and +0.5 kg in the two trials, against 0.0 and +0.3 kg on placebo, while lean body mass rose 1.3 and 1.2 kg (EGRIFTA SV label).
  • Contraindications — Pregnancy (it could harm the fetus), active cancer, disruption of the hypothalamic-pituitary axis (pituitary removal, tumor or surgery, hypopituitarism, head radiation or head trauma), and known hypersensitivity to tesamorelin or the product's other ingredients, such as mannitol. Because the drug releases growth hormone, a known growth factor, the labels call for careful weighing before starting given the higher background risk of cancer in people with HIV, and for stopping if a cancer comes back. They advise considering stopping in critically ill patients, since pharmacologic doses of growth hormone have been linked to increased deaths in acute critical illness (EGRIFTA SV label).
  • Discontinuation effect reversal — In people switched to placebo after 26 weeks, visceral fat came back over the next 26 weeks; the effect lasted only as long as treatment (Falutz et al., 2008).
  • Pediatric use — Not indicated, and not recommended, in children with open or closed growth plates; in children whose growth plates are still open, it may cause accelerated and excessive growth (EGRIFTA SV label).

What to Expect — Timeline

Tesamorelin is the most comprehensively characterized GHRH analogue in regulatory and clinical-trial terms (Dominikowski et al., 2026). The timeline below gives what those trials measured, in people with HIV.

  • Week 26 (6 months) — The Phase 3 trials' primary end point: visceral fat fell 15.2% and 10.9% in the two trials (Falutz et al., 2007; Falutz et al., 2010, JAIDS). Responders (≥8% VAT reduction, defined in advance) had larger falls in triglycerides, better adiponectin and steadier glucose than non-responders, whose fasting glucose and HbA1c rose more (Stanley et al., 2012).
  • Week 26–52 (extension phase) — In people kept on tesamorelin, the fall in visceral fat held at about 18% at 52 weeks (Falutz et al., 2008). In people with HIV and fatty liver, liver fat fell over 12 months, a 37% relative reduction compared with placebo (Stanley et al., 2019).
  • Post-discontinuation (months 1–6 off) — In people switched to placebo at 26 weeks, visceral fat rose again by 22% and 16% over the next 26 weeks in the two trials (EGRIFTA SV label); the effect lasts only as long as treatment (Falutz et al., 2008).
  • Non-responders — In the combined Phase 3 trials, 69% of people on tesamorelin reached the 8% reduction, against 33% on placebo, so 31% did not (Fourman et al., 2017).
Honest Framing

This timeline comes from trials in people with HIV. Off-label use in non-HIV populations (general visceral adiposity, NAFLD/MASH, cognition) extrapolates from it — the trajectory may be similar, or may not.

Quick Compare — Tesamorelin vs CJC-1295 DAC vs Modified GRF (1-29) vs Sermorelin

All four are GHRH-class compounds binding the same pituitary GHRH receptor. The differences are structural protection strategy, half-life, development stage, and — most consequentially — evidence quality.

FeatureTesamorelinCJC-1295 DACMod GRF (1-29)Sermorelin
SequenceFull 44-aa GHRH + trans-3-hexenoic acid on N-terminus30 aa tetrasubstituted + DAC29 aa tetrasubstituted29 aa native GRF(1-29)
Molecular weight5,136 Da3,647 Da3,368 Da3,358 Da
Protection strategyN-terminal fatty-acid capAlbumin bioconjugation (maleimide-Lys30)Four amino-acid substitutionsNone (native, unprotected)
Plasma half-life~26 minutes6–8 days~30 minutes~7 minutes
Dose cadence (tesamorelin: labels; others: online protocols reported by Dominikowski et al., 2026)Once daily SubQ1–2× per week SubQ1–2× daily SubQDaily (often pre-bed) SubQ
Pattern of GH releaseDaily pulse; cumulative IGF-1Sustained tonic + elevated troughsPulsatile, native-mimickingPulsatile, native-mimicking
IGF-1 elevation+81% at 26 weeks (Falutz et al., 2007)+80–120% (cumulative over 3–4 wk)Modest, pulse-dependentModest, pulse-dependent
FDA statusApproved (Egrifta, 2010)Not approved (Phase 2 halted 2006)Not approvedHistorically approved (pediatric GHD)
Human RCT evidenceMultiple Phase 3 + extensions (N > 800); independent liver-fat trials; cognition trial2 small Phase 1 trials (~50 subjects total)NoneMultiple in pediatric and adult GHD contexts
Visceral fat evidence–15 to –18% over 26 weeks (registered)None (no dedicated trial)NoneModest signals in older AGHD trials
Liver fat evidenceReduced ~30–40% over 12 months (Lancet HIV 2019)NoneNoneNone
Legal compounding (US)Limited (essentially-a-copy rules post-approval)No (not on any 503A list)No (not on any 503A list)Yes (traditional compounding)
WADA statusProhibited (S2)Prohibited (S2)Prohibited (S2)Prohibited (S2)

Practical interpretation:

  • Evidence quality — Tesamorelin is the evidence-backed GHRH-class compound. CJC-1295's published human dataset is two small Phase 1 trials and one halted Phase 2.
  • Indication specificity — Tesamorelin is the only GHRH analog with a registered FDA indication (visceral adiposity in HIV-lipodystrophy). All off-label uses extrapolate. CJC-1295 forms are entirely off-label and gray-market.
  • Cost vs access — Branded tesamorelin is expensive and narrowly indicated; CJC-1295 is inexpensive and broadly available from peptide vendors. Cost is a real-world driver of the choice despite the evidence asymmetry.
  • Wash-out — Tesamorelin clears within hours: its half-life is minutes (EGRIFTA SV and EGRIFTA WR labels). Relevant for pregnancy planning, pre-operative considerations, and anti-doping wash-out.

→ See full CJC-1295 profile  •  → See full Sermorelin profile

Bloodwork & Monitoring

What the FDA labels list, and what the trials measured:

  • IGF-1 (age-adjusted, expressed as SDS) — The labels call for monitoring IGF-1 during treatment and for considering stopping if it stays high (for example above 3 SDS), particularly if the response is not robust; they set no schedule. At 26 weeks in the trials, 47% had IGF-1 above 2 SDS and 36% above 3 SDS (EGRIFTA SV label).
  • Fasting glucose + HbA1c — The labels call for checking glucose status before starting and periodically during treatment, for considering stopping in people who develop glucose intolerance or diabetes without a clear response, and for monitoring people with diabetes for new or worse retinopathy (EGRIFTA SV label). In the Phase 3 trials, fasting glucose and HbA1c rose more in non-responders than in responders (Stanley et al., 2012).
  • Lipid panel — The Phase 3 trials tracked triglycerides and the total-to-HDL cholesterol ratio as secondary end points (EGRIFTA SV label); triglycerides fell more in responders than in non-responders (Stanley et al., 2012).
  • Waist circumference + imaging (VAT indication) — The trials measured visceral fat by CT at the L4–L5 level, and waist circumference (EGRIFTA SV label); a fall in visceral fat of 8% or more at 26 weeks was defined in advance as a response (Stanley et al., 2012). The labels advise weighing the risks and benefits of continuing in people whose visceral fat has not gone down (EGRIFTA SV label).
  • Liver fat (NAFLD trials) — The liver-fat trials measured liver fat by proton MR spectroscopy, and the 2019 trial also took liver biopsies (Stanley et al., 2014; Stanley et al., 2019).
  • Other medicines — The labels call for monitoring people taking drugs cleared by CYP450 liver enzymes (such as corticosteroids, sex steroids, anticonvulsants and cyclosporine), since growth hormone may change their clearance, and note that people on glucocorticoid replacement for adrenal insufficiency may need higher doses (EGRIFTA SV label).

Practical User Notes

About These Notes

Tesamorelin is an FDA-approved prescription drug — the notes below come from its labels and trials. This is not medical guidance; prescribing it is a licensed clinician’s call.

  • The 26-week response — In the Phase 3 trials, a fall in visceral fat of 8% or more at 26 weeks was defined in advance as a response; responders had larger falls in triglycerides, better adiponectin and steadier glucose over 52 weeks than non-responders (Stanley et al., 2012). The labels advise weighing the risks and benefits of continuing in people whose visceral fat has not gone down (EGRIFTA SV label).
  • Timing of injection — The FDA labels do not specify a time of day. The cognition trial gave it 30 minutes before bedtime (Baker et al., 2012).
  • Fasting considerations — The labels say nothing about food or fasting.
  • Abdominal injection — The labels direct injection into the abdomen, changing the site with each dose, at least 2 inches (5 cm) from the navel and not into scar tissue or bruises (EGRIFTA SV and EGRIFTA WR labels).
  • Glucose before starting — The labels call for checking glucose status before starting. Diabetes is not a contraindication, but the Phase 3 trials required fasting glucose below 150 mg/dL and listed type 1 or type 2 diabetes and past use of insulin or diabetes pills among their exclusions (EGRIFTA SV label).
  • Cost — A 2012 review lists high cost among tesamorelin's limitations (Spooner & Olin, 2012). Clinic sites offer compounded tesamorelin for off-label use.
  • Discontinuation — In the trials, visceral fat came back within 26 weeks of switching to placebo; the effect lasted only as long as treatment (Falutz et al., 2008).
  • What tesamorelin does NOT do — The labels say it is not for weight loss: its effect on weight is neutral (EGRIFTA SV label). In the trials, abdominal fat under the skin did not change significantly (Falutz et al., 2010, JCEM), and glucose rose more in non-responders than in responders (Stanley et al., 2012).
  • When the labels call for stopping — Pregnancy, a cancer that comes back, or a suspected allergic reaction, with prompt medical attention; the labels advise considering stopping when IGF-1 stays high or glucose intolerance develops without a clear response, and in critical illness (EGRIFTA SV label).

Commonly Stacked With

Tesamorelin with ipamorelin as a named stack; a peptide promoter's newsletter describes the two sold together in one vial (6 mg + 2 mg). Trials of the pair itself: zero.

Tested together in people: none published · Read the receipt →

A clinic site describes tesamorelin as often combined with ipamorelin. Kalios catalogues no study of the pair, or of the pair against tesamorelin alone.

Tested together in people: none published · Read the receipt →

A longevity clinic's site describes patients combining tesamorelin with GLP-1 drugs such as tirzepatide. No controlled combination data.

Tested together in people: none published · Read the receipt →

As with tirzepatide: the same clinic site describes patients combining tesamorelin with GLP-1 drugs such as semaglutide. Kalios catalogues no study of the pair.

Tested together in people: none published · Read the receipt →

Stacking this? Read the receipt →

→ Calculator — vial-to-syringe math

Legal Status

Current Status — April 2026

Tesamorelin is an FDA-approved prescription medication, approved November 10, 2010 for the reduction of excess visceral adipose tissue in HIV-infected adult patients with lipodystrophy. It is marketed in the United States by Theratechnologies Inc. as Egrifta SV (the 2019 reformulation) and, since September 2025, Egrifta WR. The approval is narrow — confined to HIV-lipodystrophy — and all other uses (non-HIV visceral adiposity, NAFLD/MASH, cognition, anti-aging) are off-label.

FDA approved Egrifta WR (the F8 formulation) on March 25, 2025, and Theratechnologies made it available in the US in September 2025. One 11.6 mg vial, mixed with 1.3 mL of the supplied bacteriostatic water, gives a daily 1.28 mg dose (0.16 mL) for 7 days, kept at room temperature once mixed; Egrifta SV is mixed fresh for each 1.4 mg dose (EGRIFTA WR and EGRIFTA SV labels). Both vials are stored at room temperature before mixing. The indication is unchanged, and the label says the two are not substitutable.

Tesamorelin is on the WADA Prohibited List under Section S2 (Peptide Hormones, Growth Factors, Related Substances and Mimetics) as a growth hormone secretagogue / GHRH analog. Detection methods have been validated in WADA-accredited laboratories (Knoop et al.; Memdouh et al., 2021).

Compounded tesamorelin exists in some jurisdictions. Compounding eligibility of tesamorelin in 503A/503B pharmacies follows the standard FDA bulk-drug-substance framework — because tesamorelin has an FDA-approved product, "essentially a copy" rules significantly restrict legal compounding. Patient-specific clinical justification (allergy to an approved-product excipient, clinical need not met by approved dosing) is the typical pathway.

Cost & Access

Brand availability: Egrifta SV (tesamorelin acetate, Theratechnologies, FDA-approved 2010 for HIV-associated lipodystrophy; 2019 reformulation) is dispensed via specialty pharmacy on prescription. Patient assistance programs are available for the approved HIV-lipodystrophy indication; insurance coverage typically requires prior authorization with documentation of HIV-associated lipodystrophy. Off-label use for general visceral fat reduction is generally not insurance-covered at brand acquisition.

503A compounded availability: Compounded tesamorelin is widely dispensed by men's health, longevity, and TRT/HRT clinics for clinician-prescribed off-label visceral fat reduction and adjunct GH-axis stimulation. The dramatic access differential between the FDA-approved branded product and 503A compounded tesamorelin drives most off-label use into the compounded pathway, where patient-specific clinical justification is the typical rationale.

Tesamorelin is not on the Category 2 bulk substance list, and it was not among the 12 peptides FDA removed from that list in April 2026 (FDA 503A categories list, April 22, 2026). It is an FDA-approved branded drug with established regulatory pathway; off-label compounded use is via the standard 503A pathway available to any FDA-approved compound.

Estimated pricing as of April 2026. Actual costs vary by provider, location, and prescription status. Kalios does not sell compounds.

References

  1. Falutz J, Allas S, Blot K, Potvin D, Kotler D, Somero M, et al. Metabolic effects of a growth hormone-releasing factor in patients with HIV. N Engl J Med. 2007;357(23):2359-2370. PMID: 18057338.
  2. Falutz J, Allas S, Mamputu JC, Potvin D, Kotler D, Somero M, et al. Long-term safety and effects of tesamorelin, a growth hormone-releasing factor analogue, in HIV patients with abdominal fat accumulation. AIDS. 2008;22(14):1719-1728. PMID: 18690162.
  3. Falutz J, Potvin D, Mamputu JC, Assaad H, Zoltowska M, Michaud SE, et al. Effects of tesamorelin, a growth hormone-releasing factor, in HIV-infected patients with abdominal fat accumulation: a randomized placebo-controlled trial with a safety extension. J Acquir Immune Defic Syndr. 2010;53(3):311-322. PMID: 20101189.
  4. Falutz J, Mamputu JC, Potvin D, Moyle G, Soulban G, Loughrey H, et al. Effects of tesamorelin (TH9507), a growth hormone-releasing factor analog, in human immunodeficiency virus-infected patients with excess abdominal fat: a pooled analysis of two multicenter, double-blind placebo-controlled phase 3 trials with safety extension data. J Clin Endocrinol Metab. 2010;95(9):4291-4304. PMID: 20554713.
  5. Falutz J, Allas S, Kotler D, Thompson M, Koutkia P, Albu J, et al. A placebo-controlled, dose-ranging study of a growth hormone releasing factor in HIV-infected patients with abdominal fat accumulation. AIDS. 2005;19(12):1279-1287. PMID: 16052083.
  6. Koutkia P, Canavan B, Breu J, Torriani M, Kissko J, Grinspoon S. Growth hormone-releasing hormone in HIV-infected men with lipodystrophy: a randomized, controlled trial. JAMA. 2004;292(2):210-218. PMID: 15249570.
  7. Stanley TL, Falutz J, Marsolais C, Morin J, Soulban G, Mamputu JC, et al. Reduction in visceral adiposity is associated with an improved metabolic profile in HIV-infected patients receiving tesamorelin. Clin Infect Dis. 2012;54(11):1642-1651. PMID: 22495074.
  8. Stanley TL, Feldpausch MN, Oh J, Branch KL, Lee H, Torriani M, Grinspoon SK. Effect of tesamorelin on visceral fat and liver fat in HIV-infected patients with abdominal fat accumulation: a randomized clinical trial. JAMA. 2014;312(4):380-389. PMID: 25038357.
  9. Stanley TL, Fourman LT, Feldpausch MN, Purdy J, Zheng I, Pan CS, et al. Effects of tesamorelin on non-alcoholic fatty liver disease in HIV: a randomised, double-blind, multicentre trial. Lancet HIV. 2019;6(12):e821-e830. PMID: 31611038.
  10. Fourman LT, Czerwonka N, Feldpausch MN, Weiss J, Mamputu JC, Falutz J, et al. Visceral fat reduction with tesamorelin is associated with improved liver enzymes in HIV. AIDS. 2017;31(16):2253-2259. PMID: 28832410.
  11. Stanley TL, Falutz J, Mamputu JC, Soulban G, Potvin D, Grinspoon SK. Effects of tesamorelin on inflammatory markers in HIV patients with excess abdominal fat: relationship with visceral adipose reduction. Clin Infect Dis. 2011;53(11):1150-1158. PMID: 21516030.
  12. Baker LD, Barsness SM, Borson S, Merriam GR, Friedman SD, Craft S, Vitiello MV. Effects of growth hormone-releasing hormone on cognitive function in adults with mild cognitive impairment and healthy older adults: results of a controlled trial. Arch Neurol. 2012;69(11):1420-1429. PMID: 22869065.
  13. Dhillon S. Tesamorelin: a review of its use in the management of HIV-associated lipodystrophy. Drugs. 2011;71(8):1071-1091. PMID: 21668043.
  14. Spooner LM, Olin JL. Tesamorelin: a growth hormone-releasing factor analog for HIV-associated lipodystrophy. Ann Pharmacother. 2012;46(2):240-247. PMID: 22298602.
  15. Bedimo R. Growth hormone and tesamorelin in the management of HIV-associated lipodystrophy. HIV AIDS (Auckl). 2011;3:69-79. PMID: 22096409.
  16. Memdouh S, Cowan DA, Walker C, Board K, Kicman AT, Parkin MC. Advances in the detection of growth hormone releasing hormone synthetic analogs. Drug Test Anal. 2021;13(11-12):1871-1884. doi: 10.1002/dta.3183.
  17. U.S. Food and Drug Administration. Egrifta (tesamorelin for injection) Prescribing Information. Initial U.S. Approval: 2010. Latest revision 2024.
  18. Theratechnologies Inc. Egrifta SV and Egrifta WR product information. theratech.com.
  19. Theratechnologies Inc. EGRIFTA WR (tesamorelin) for injection — Prescribing Information (revised March 2025). BLA 022505. DailyMed set ID 839334d3-8c1d-4c26-9036-2ab524a6ea75.
  20. U.S. Food and Drug Administration. Approval letter, BLA 022505/S-020 (EGRIFTA WR, F8 formulation). March 25, 2025.
  21. Theratechnologies Inc. Theratechnologies announces availability of EGRIFTA WR. September 5, 2025.
  22. ClinicalTrials.gov. NCT00123253 (Phase 3 registration); NCT01263717 (JAMA liver fat); NCT02196831 (Lancet HIV NAFLD); NCT00257712 (Arch Neurol cognition).
  23. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. Tesamorelin. National Institute of Diabetes and Digestive and Kidney Diseases. NBK548730.
  24. World Anti-Doping Agency. The 2026 Prohibited List. Section S2 — Peptide Hormones, Growth Factors, Related Substances and Mimetics. wada-ama.org.
  25. Theratechnologies Inc. EGRIFTA SV (tesamorelin) for injection, 2 mg vial — Prescribing Information, section 16: How Supplied/Storage and Handling. BLA 022505; revised July 2026. DailyMed set ID 3d783378-b02d-4f19-99dd-0fc91a042224.
  26. FDA. Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the FD&C Act (503A categories list), versions updated April 15, April 22 and May 14, 2026. fda.gov/media/94155/download. Read October 3, 2026. (Notice that 12 peptides would leave Category 2 because their nominations were withdrawn; their removal; GHK-Cu, except injectable, back in Category 1.)
  27. Makimura H, Feldpausch MN, Rope AM, Hemphill LC, Torriani M, Lee H, Grinspoon SK. Metabolic effects of a growth hormone-releasing factor in obese subjects with reduced growth hormone secretion: a randomized controlled trial. J Clin Endocrinol Metab. 2012;97(12):4769-4779. PMID: 23015655.
  28. Dominikowski A, Rękoś Z, Olejarz M, Szczepanek-Parulska E, Domin R, Ruchała M. The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration. Front Endocrinol (Lausanne). 2026;17:1822475. PMID: 42395176.

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Checked 18 Oct 2026