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Tesamorelin

Tesamorelin is an FDA-approved synthetic growth hormone-releasing hormone (GHRH) analog designed for treating HIV-associated lipodystrophy.

Also known as: GHRH Analog, Visceral Fat Reduction

Typical Dose 1.4 mg daily
Storage Refrigerate reconstituted; store lyophilized powder away from light
How Often Once daily

Overview

Tesamorelin is an FDA-approved synthetic growth hormone-releasing hormone (GHRH) analog designed for treating HIV-associated lipodystrophy. This 44-amino acid peptide with a trans-3-hexenoic acid modification selectively reduces visceral adipose tissue while preserving subcutaneous fat, making it unique among growth hormone therapies.

Key Benefits

  • HIV-Associated Lipodystrophy
  • Selective Visceral Fat Targeting
  • Sustained Fat Loss

FDA-approved formulation, selective visceral fat targeting, proven clinical efficacy, standardized dosing

Mechanism of Action

Subcutaneous injection provides optimal bioavailability for GHRH receptor binding and pulsatile GH release stimulation

Pharmacokinetics

Peak plasma concentration: 9 min. Elimination half-life: 26 min. Largely cleared by: ~2.1 hrs.

Research Protocols Injectable

GoalDoseFrequencyRoute
HIV Lipodystrophy (FDA Approved)1.4 mg dailyOnce dailySubcutaneous
Visceral Fat Reduction2 mg dailyOnce dailySubcutaneous
Anti-aging/Body Composition1-2 mg daily5-7 days/weekSubcutaneous
NAFLD Treatment2 mg dailyOnce dailySubcutaneous
Cognitive Enhancement (Research)1 mg dailyOnce dailySubcutaneous
Research Protocol1-2 mg dailyDailySubcutaneous

Research protocols from published literature — not dosing recommendations.

Peptide Interactions

  • Ipamorelin — Monitor Combination: Synergistic GH stimulation possible. Monitor IGF-1 levels closely and consider dose adjustments to prevent excessive growth hormone elevation.
  • CJC-1295 — Use Caution: Both bind to pituitary GHRH receptors. Combining saturates receptors without amplifying GH release, risking receptor desensitization and blunted pulsatility. Choose one based on your protocol goals.
  • CJC-1295 with DAC — Avoid Combination: Both target GHRH receptors but with conflicting release patterns. Tesamorelin promotes pulsatile GH release while DAC provides continuous stimulation, disrupting natural GH rhythms and accelerating receptor downregulation.
  • Sermorelin — Dose Dependent: Similar GHRH mechanism but Tesamorelin has longer half-life. Low doses may be complementary, but higher doses risk excessive GH stimulation.
  • Insulin — Monitor Combination: Tesamorelin increases diabetes risk (3.3-fold). Monitor blood glucose closely and adjust insulin doses as needed during treatment.
  • Metformin — Compatible: No direct interactions reported. May help mitigate glucose intolerance risk associated with Tesamorelin therapy.
  • Prednisone — Use Caution: Decreases corticosteroid effectiveness. Consider increasing steroid doses or using alternative anti-inflammatory therapy.
  • Octreotide — Avoid Combination: Somatostatin analog directly blocks GH release, completely negating Tesamorelin's therapeutic effects.
  • Growth Hormone — Avoid Combination: Redundant and potentially dangerous combination. Risk of acromegaly and metabolic complications from excessive GH exposure.

Peptide Instructions Injectable

Supplies:

  • Tesamorelin vial (Egrifta SV 2mg or Egrifta WR 11.6mg)
  • Sterile water for injection (SV) or bacteriostatic water (WR)
  • Insulin syringes (27-30 gauge, 0.5-1mL)
  • Alcohol swabs for injection site preparation

How to Reconstitute Injectable

  1. 1Remove vial from refrigerator (powder should be stored at 2-8°C) and allow to reach room temperature
  2. 2Egrifta SV: Add 0.5 mL sterile water to 2 mg vial
  3. 3Egrifta WR: Add 1.3 mL bacteriostatic water to 11.6 mg vial
  4. 4Gently swirl to dissolve - do not shake vigorously to prevent protein denaturation
  5. 5Solution should be clear and colorless - do not use if cloudy or contains particles
  6. 6Withdraw appropriate dose (typically 0.35 mL for 1.4 mg from SV preparation)
  7. 7Inject subcutaneously in abdomen, rotating sites to prevent lipodystrophy
  8. 8SV: Use immediately after mixing, discard any remaining solution. WR: Store at room temperature (20-25°C) for up to 7 days — do NOT refrigerate as it may cause precipitation

What to Expect Injectable

Week 1-2: IGF-1 levels begin to rise, possible mild water retention or joint discomfort. Week 4-6: Early metabolic changes, slight improvements in energy and sleep quality. Week 8-12: Visible visceral fat reduction begins, waist circumference may decrease. Week 12-26: Peak effects achieved with significant body composition improvements.

Side Effects & Safety

Monitor blood glucose regularly - 3.3-fold increased diabetes risk documented. IGF-1 levels should be checked monthly - 47% exceed normal range at 26 weeks. Contraindicated in active malignancy or pituitary disorders. Common side effects include injection site reactions (17%) and joint pain (13%).

Monitor blood glucose regularly - 3.3-fold increased diabetes risk documented. IGF-1 levels should be checked monthly - 47% exceed normal range at 26 weeks. Contraindicated in active malignancy or pituitary disorders. Common side effects include injection site reactions (17%) and joint pain (13%).

Community Insights

Tesamorelin should be stored at Unreconstituted powder: refrigerate at 2-8°C. Reconstituted solution: room temperature (20-25°C) — do NOT refrigerate after mixing. Use SV immediately, WR stable 7 days..

Molecular Information

Molecular Weight 5,135.9 Da
Length 44
Type GHRH analog
Sequence His-Ala-Asp-Gly-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-Gln-Gln-Gly-Glu-Ser-Asn-Gln-Glu-Arg-Gly-Ala-Arg-Ala-Arg-Leu

References

  1. Cardiovascular Risk Assessment · 2025
  2. Effects of tesamorelin on hepatic transcriptomic signatures in HIV-associated NAFLD Fourman, L.T., Billingsley, J.M., Daniels, K., et al. · Scientific Reports 2021
  3. Anti-inflammatory Effects Study · 2021
  4. Effects of tesamorelin on non-alcoholic fatty liver disease in HIV: a randomised, double-blind, multicentre trial Stanley, T.L., Fourman, L.T., Zheng, I., et al. · The Lancet HIV 2019
  5. The effects of tesamorelin on muscle and bone parameters in HIV-infected patients with abdominal fat accumulation Adrian, S., Scherzinger, D., Sanchez, R., et al. · The Journal of Frailty & Aging 2019
  6. NAFLD Treatment Trial · 2019
  7. Effects of growth hormone-releasing factor on visceral fat, metabolic, and cardiovascular indices in human immunodeficiency virus-infected patients with abdominal fat accumulation Kotler, D.P., Muurahainen, N., Grunfeld, C., et al. · PLoS One 2017
  8. Effects of tesamorelin on inflammatory markers in HIV patients with excess abdominal fat: relationship with visceral adipose reduction Grinspoon, S.K., Fitch, K.V., Zanni, M.V., et al. · AIDS 2013
  9. Growth hormone-releasing hormone effects on brain γ-aminobutyric acid levels in mild cognitive impairment and healthy aging Friedman, S.D., Baker, L.D., Borson, S., et al. · JAMA Neurology 2013
  10. Effects of growth hormone-releasing hormone on cognitive function in adults with mild cognitive impairment and healthy older adults: results of a controlled trial Baker, L.D., Barsness, S.M., Borson, S., et al. · Archives of Neurology 2012
  11. Cognitive Enhancement Study · 2012
  12. Metabolic effects of a growth hormone-releasing factor in patients with HIV Falutz, J., Allas, S., Blot, K., et al. · Journal of Clinical Endocrinology & Metabolism 2010
  13. FDA Approval Package for Egrifta (tesamorelin) for injection US Food and Drug Administration · FDA Drug Approval Package 2010
  14. LIPO-010 FDA Approval Trial · 2010
  15. 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 Falutz, J., Mamputu, J.C., Potvin, D., et al. · Journal of Clinical Endocrinology & Metabolism 2006
  16. CTR-1011 Extended Safety Study · 1011

Research reference only. Not medical advice.