Cycle-length evidence
Sermorelin cycle length: what human studies ran
Not approved — research use onlyBLimited human data
Short answer: there is no established Sermorelin cycle length, and we found no human studies that report one.
Treatment and follow-up in human studies
No human study durations are recorded.
What has not been tested
- On-and-off schedules or breaks between courses.
- Repeated courses and long-term exposure beyond the periods listed.
- Sermorelin combined with other compounds, unless a study above says so.
Frequently asked questions
Is there an established Sermorelin cycle length?
No. We found no human studies that report a treatment duration for Sermorelin.
What is the longest human study of Sermorelin?
None is recorded.
Do study durations tell me how long to use something?
No. A study duration is how long investigators administered a compound to selected participants under monitoring. It is not a recommended course, and a break between courses has not been tested for any compound on this site that is not approved.
References
- Determination That GEREF (Sermorelin Acetate) Injection, 0.5 Milligrams Base/Vial and 1.0 Milligrams Base/Vial, and GEREF (Sermorelin Acetate) Injection, 0.05 Milligrams Base/Amp, Were Not Withdrawn From Sale for Reasons of Safety or Effectiveness (78 FR 14095) Federal Register (FDA notice). 2013
- Drugs@FDA application records for GEREF (NDA 019863 and NDA 020443), marketing status Discontinued, queried through openFDA openFDA / Drugs@FDA. 2026
- Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic growth hormone deficiency BioDrugs. 1999
- Once daily subcutaneous growth hormone-releasing hormone therapy accelerates growth in growth hormone-deficient children during the first year of therapy (Geref International Study Group) J Clin Endocrinol Metab. 1996
- EGRIFTA WR (tesamorelin) for injection, prescribing information (growth hormone-releasing factor physiology) FDA label (DailyMed). 2025
- World Anti-Doping Agency International Standard Prohibited List 2026 WADA. 2026
- PubChem compound record for sermorelin PubChem. 2026