Who changed, what changed, and for how long
PT-141 Results: What Women Noticed
You'll see the small average gain, so you can judge the harms and unanswered questions for your health.
What do the main results mean for you?
Animal studies gave scientists the first clue. Human studies came next. The main studies involved women before menopause.
PT-141 results were better than a placebo, a dummy shot. On average, women reported a slight rise in desire, while distress eased [3]. The studies didn't say how many women felt enough change to matter [10].
A year-long follow-up showed that the benefit held. It uncovered no added safety problem [4]. Later brain and cell studies asked different questions [5][13].
Each result below names who took part. You'll also see how long the study ran. That helps you judge what the finding can mean.
A positive result isn't a sure result for you. An average combines women who felt different amounts of change. Your own result could be higher, lower, or none.
How much did women change in the main trials?
The two Phase 3 trials included 1,267 women. This was a large, late test in people. Low desire was causing each woman distress.
Women used bremelanotide 1.75 mg when needed. After 24 weeks, desire had risen a little [3]. Their distress had eased a little too.
The study's chance test was below .001. That means the difference was unlikely to be luck. It doesn't mean the average gain was large or useful.
Both trials found much the same result. That adds trust but doesn't promise your outcome. Nausea, headache, and flushing, a sudden warm red feeling, were the main complaints [3].
What lasted during the 52-week follow-up?
A short study can make a drug look better. Researchers therefore kept following 684 women. That study ran for up to 52 weeks.
Desire stayed higher during that time [4]. No new safety problem appeared. The longer watch gives you more to judge.
Nausea affected 40.4% of the women. Flushing, sudden warmth and red skin, affected 20.6%, while headache affected 12.0% [4]. Nausea remained a major drawback.
The women weren't sick every day for a year. Nausea happened after shots during the study. You may still find that tradeoff hard.
What did the women's brain scans show?
In 2022, researchers scanned 31 women. None had reached menopause. Troubling low desire affected every woman.
After one dose, the women reported higher desire for as many as 24 hours. Two brain areas worked more closely while they viewed sexual pictures [5]. The finding shows that the brain responded.
The study was small. It can't tell you what all women will feel. It also can't show whether the change felt worthwhile.
Use the scan as support, not a promise. The scan gives a body sign beside the women's own reports. It doesn't promise relief for you.
Did the benefit feel large enough to matter?
One review compared results from separate studies, not the same women. PT-141 and talk therapy had similar overall score changes [10]. Women given placebo improved too.
That means the drug didn't cause all the change. Its added average gain was much smaller. You may or may not find that useful.
Other reviews call the desire and distress gains small [7]. The studies didn't give a clear count of women who felt enough change to matter. That leaves an important question open.
Keep both sides in view. Placebo groups came fairly close to the drug group. Your hopes need to match that small average gain.
Clinical access
Trial results inform individual care
Trial scores show group averages, not how one person will feel or handle side effects like nausea. For PT-141, a licensed clinician evaluates each person before deciding whether to prescribe, and Promise Peptides (mypromise.com) is a doctor-guided telehealth service that works that way.
What do expert PT-141 reviews add?
Expert PT-141 reviews compare several choices for treating women's low desire. In 2025, one review listed the drug as an option [16]. The review didn't name one clear winner.
In 2025, one paper compared PT-141 with flibanserin, another drug for women's low desire, and testosterone, a hormone [15]. Another report said some women had more arousal and easier orgasms [14]. It didn't say how often that happened or how large the change felt.
User reviews are different. They're personal reports, not checked study results. You can read them on the effects page.
Expert reviews show the range of medical choices. Personal reports tell you what one person noticed. You can't give both kinds the same weight.