what the label says, not dose advice
PT-141 dosage: the label lists 1.75 mg when needed.
Here are the amounts and times used in studies. They are facts from the label, not your own dose.
First, these are study facts, not your dose
Studies followed the amount stated on the FDA label. This page reports that amount. It isn't telling you what to take. You get the facts, not a personal plan.
The label lists 1.75 mg in an under-the-skin shot, when needed. The shot is given at least 45 minutes before sex. The limits are one shot in 24 hours and no more than 8 each month [6]. You can ask what those limits mean for you.
The same plan was used in the main trials [3]. Your doctor must make any real dose choice with you. This page can't do that.
Powder sold as a "PT-141 research chemical" isn't the finished drug. You won't find mixing steps for human use here. You can't turn those facts into safe directions.
The label sets the 1.75 mg limit
The FDA label lists one shot containing 1.75 mg under the skin. Women use the shot only when needed. The wait is at least 45 minutes before sex. The limits are one shot in 24 hours and no more than 8 each month [6]. Those are firm caps.
The approved device comes filled and ready. You don't mix the medicine yourself [6]. You also don't choose a new strength.
Researchers tested several amounts before choosing this one. A Phase 2 study is an early test used to pick the amount. It compared 0.75, 1.25, and 1.75 mg. The 1.75 mg amount moved into the large later tests. That is how the final amount was chosen.
Earlier research looked very different. Nose-spray studies in men reached about 7–20 mg. A Phase 1 study is a first small safety test. One such test gave women up to 2.5 mg, three times each day, for 15 days [6]. Those old test plans aren't directions for you.
The monthly limit matters. More frequent use brought darker skin and changes in hunger or weight [6]. Keep that reason beside the number.
How long does PT-141 last in the blood?
Studies found PT-141 drops from the blood fairly fast. The label gives a half-life of about 2.7 hours. Half the amount remains after that time. You can use that meaning when you read the number.
The study range was about 1.9–4.0 hours [6]. Blood levels peaked at about 0.5 to 1.0 hour. Your own blood level wasn't measured here.
Most measurable drug is gone within one day [6]. That fits use only as needed. FDA timing is at least 45 minutes beforehand [6]. You can't use that fact to predict every feeling.
Half-life describes the drug in blood. It isn't a promise about how long you will feel an effect.
PT-141 half life means the blood level falls by half
The PT-141 label puts the half-life near 2.7 hours after an under-the-skin shot [6]. Half-life means the blood has lost half the drug by then. It doesn't tell you how long you'll feel a change.
About 21% of the drug sticks to blood proteins. Scientists use that fact to track how the drug travels. Your blood isn't losing protein.
Most broken-down drug leaves in urine, while less leaves in stool [6]. Scientists learned that by tracing a study dose. The tracing didn't change how the drug acted.
The body splits the peptide and passes those small pieces out [6].