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AMIRAVOResearch Library
Cycle-length evidence

TRH (Thyrotropin) cycle length: what human studies ran

Approved, no longer marketedAHuman trial evidence
Short answer: TRH (Thyrotropin) has no "cycle". As an approved drug it is used as its label and a prescriber direct.

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.
  • TRH (Thyrotropin) combined with other compounds, unless a study above says so.

Frequently asked questions

Is there an established TRH (Thyrotropin) cycle length?
No cycle is defined. TRH (Thyrotropin) is an approved drug whose label describes treatment under a prescriber's care; the label, not a cycle, governs duration.
What is the longest human study of TRH (Thyrotropin)?
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.
TRH (Thyrotropin) dosing reference Full research page

References

  1. Drugs@FDA application records for protirelin: NDA 017638 (THYPINONE, Abbott) and NDA 018087 (THYREL TRH, Ferring), both products flagged Discontinued FDA Drugs@FDA / openFDA drug/drugsfda. 2026
  2. DailyMed label search for protirelin, returning bulk active-ingredient listings only and no finished human product label NLM DailyMed. 2026
  3. Novel thyrotropin-releasing hormone analogs: a patent review Expert Opin Ther Pat. 2011
  4. Thyrotropin-releasing hormone analogs Mini Rev Med Chem. 2006
  5. Effect of growth hormone therapy on thyroid function in isolated growth hormone deficient and short small for gestational age children: a two-year study, including on assessment of the usefulness of the thyrotropin-releasing hormone (TRH) stimulation test J Pediatr Endocrinol Metab. 2020
  6. Drug treatment for spinal muscular atrophy types II and III Cochrane Database Syst Rev. 2020
  7. Role of the thyrotropin-releasing hormone of the limbic system in mood and eating regulation J Integr Neurosci. 2022
  8. Gonadotropin-releasing hormone stimulation test and diagnostic cutoff in precocious puberty: a mini review Ann Pediatr Endocrinol Metab. 2020
  9. Pituitary apoplexy probably due to TRH and GnRH stimulation tests in a patient with acromegaly J Endocrinol Invest. 1999
  10. Total thyroxine and thyroid-stimulating hormone responses of healthy cats to different doses of thyrotropin-releasing hormone J Vet Diagn Invest. 2024
  11. Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the FD&C Act, updated May 14, 2026 FDA. 2026
  12. World Anti-Doping Code International Standard: Prohibited List 2026 WADA. 2026