Amounts tested, with their limits
What can PT-141 dosage figures tell you?
You can see what amounts women received and what the label permits. Your health needs more thought than choosing a figure.
What can an amount tell you about treatment?
As a prescription drug, PT-141 treats distressing low desire in a defined group of women. This page explains tested amounts, the label's limits, and the fall in blood levels. The label lists 1.75 mg as needed for women with distressing lost desire before menopause, in shots under the skin [7]. Shots are limited to one per 24 hours, and capped at eight across a month.
I'd ask about safety before asking whether a study amount suited you. The 2.7 hours on the label measures a later fall: blood levels take that long to halve during that stage [7]. The label doesn't give an exact start for that later stretch. You can't count from the shot or use that time to predict desire or decide care.
Early tests used the nose, a vein, and higher amounts for other questions [1][7]. Those questions included men's responses, eating, and body weight. You can't turn those research amounts into a plan for yourself.
Which limits are listed for PT-141 dosage?
The PT-141 dosage label lists 1.75 mg as needed, by a shot just under your skin. It lists at least 45 minutes before sex, one dose per 24 hours, and at most eight in a month [7]. Those are published limits for the approved use, and don't decide a treatment for you.
Your blood pressure may go up briefly after the medicine [7]. The label excludes treatment when your high blood pressure hasn't been brought under control. Treatment is also excluded for known disease of the blood vessels or heart. A doctor has to consider your health before choosing care; the amount isn't the whole decision.
How were study amounts chosen for PT-141 dosage for women?
The approved PT-141 dosage for women is 1.75 mg given when needed in shots just below the skin, subject to the monthly limit [7]. Earlier Phase 2 trials, small studies before the larger tests, tried 0.75, 1.25, and 1.75 mg [7]. You aren't being offered those amounts as treatment choices.
A separate Phase 1 study, an early test, looked at eating and weight [7]. Researchers gave women as many as three shots daily for 15 days, with up to 2.5 mg in each. That wasn't treatment for low desire, and you can't borrow the schedule for your care.
Does the approved PT-141 injection need mixing?
The approved PT-141 injection goes just below your skin [7]. The medicine comes in a filled device, so you don't mix powder. You don't get the approved medicine's safeguards with lab powders: the drug's contents, strength, and purity aren't checked in the same way [7].
You can't assume a powder matches the approved medicine. These pages don't teach you to mix powders or give yourself shots. Early tests through the nose gave uneven amounts in blood, so that method was dropped; early tests also used a vein [7].
How long does PT-141 last, and when does that clock start?
How long does PT-141 last has different answers for blood levels and desire. Blood levels rise after the shot, reaching their highest point around 0.5–1.0 hours later [7]. Later, falling blood levels take about 2.7 hours to halve, rather than halving that long after your shot. Tests through the nose found a slightly shorter fall [7].
Your desire doesn't follow that blood clock exactly. In brain scan tests, women described increased desire lasting up to 24 hours after one dose [5]. You can't count on the same length of benefit.
What happens to the medicine in your blood?
Protein already in your blood can hold onto medicine and release the drug again. About 21% of this medicine is held that way, rather than broken down. To remove the drug, your body splits the ring into smaller parts that leave through your urine and stool [7].
The LiverTox medical review also describes how the drug breaks apart [10]. It says this medicine and other drugs have little effect on each other's action. That isn't a promise that every combination is safe for you, or a way to choose your dose.