PT-141 Side Effects: Safety Signals and Warnings
PT-141 safety concerns are compound-specific. The main listed side effects are Nausea (40%), Flushing, and Headache. The main warning signals are Contraindicated in uncontrolled hypertension, May cause transient BP increase, and Limit to 8 doses per month.
Direct Answer
PT-141 (bremelanotide) is FDA-approved for hypoactive sexual desire disorder in premenopausal women (Vyleesi), providing a regulatory anchor for sexual health research. Phase 3 data in women is solid; male sexual dysfunction data is earlier-stage. For melanocortin-pathway sexual health research, this is the best-evidenced starting point.
- Evidence grade
- Level A
- Research status
- FDA Approved
- Category
- Sexual Health
- Best for
- Hypoactive sexual desire disorder (women), sexual dysfunction research, melanocortin pathway
Reported Side Effects
- Nausea (40%)
- Flushing
- Headache
- Injection site reactions
- Transient blood pressure increase
- Hyperpigmentation with repeated use
Warnings
- Contraindicated in uncontrolled hypertension
- May cause transient BP increase
- Limit to 8 doses per month
- Risk of hyperpigmentation with frequent use
- Nausea may be significant
Known or Plausible Interactions
- Naltrexone (reduced efficacy)
- Antihypertensives (additive BP effects)
- Other melanocortin agonists (additive effects)
Regulatory Context
FDA-approved as Vyleesi for HSDD in premenopausal women (2019). Prescription required. Available by auto-injector. Not approved for male sexual dysfunction. Also available as a research peptide.
Evidence Snapshot
| Evidence grade | Level A |
|---|---|
| Research status | FDA Approved |
| Best supported outcomes | Female Sexual Desire (Level A), Nausea (Level A), and Male Erectile Function (Level B) |
| Primary citation count | 2 |
| Last reviewed | 2026-06-02 |
Related Guides
How to Cite This Page
ExaminePeptides. "PT-141 Side Effects: Safety Signals and Warnings." Last reviewed 2026-06-02. https://examinepeptides.com/answers/pt-141-side-effects-safety/
This static answer page is built for fast indexing and direct citation. It summarizes the matching full evidence review and links back to primary sources where the source database includes them.