PT-141 Dosage Guide: How Much Bremelanotide for Men and Women

The FDA recommended dosage of PT-141 is 1.75 mg, a single subcutaneous injection at least 45 minutes prior to sexual activity. The dose is for the brand name prescription version of bremelanotide, called Vyleesi, which is used for premenopausal women who have low sexual drive. No more than 1 dose every 24 hours or more than 8 doses per month. Off label and not FDA approved for use in men.

What Is PT-141?

The chemical bremelanotide is known as PT-141 and is sold under the brand name, Vyleesi. In 2019, Dhillon and Keam published a review in Drugs which found that it was a peptide that works on melanocortin receptors (MC3R and MC4R) in the brain. These receptors play a role in regulating sexual desire and arousal. PT-141 is not a medication that alters blood flow like Viagra or Cialis. Rather, it does so in the brain to stimulate desire itself.

Here are some things to know in advance. The recommended dosage is 1.75 mg subcutaneously (under the skin), given 45 minutes before sexual activity, not to exceed 1 dose every 24 hours and 8 doses per month. PT-141 for men is an off-label drug without an approved dosage. The most common side effect is nausea, which affects about 40% of users. It can make people's blood pressure temporarily go up, so it is not recommended for people who have heart disease or high blood pressure. The limits are straight from the FDA Vyleesi prescribing label.

Vyleesi received FDA approval back in 2019 for a single indication: the treatment of acquired hypoactive sexual desire disorder (HSDD) in premenopausal women. PT-141 also is available from compounding pharmacies and as a research peptide. These versions are not FDA approved and may not be as safe and of the same quality as Vyleesi. To use wellness tracking tools, look to August AI.

The FDA-Approved PT-141 Dosage for Women

The pt 141 for women dosage approved by the FDA is 1.75 mg given as a single shot under the skin. It comes in a prefilled autoinjector pen that holds 1.75 mg in 0.3 mL of solution, per the FDA prescribing information.

The dose is injected into the abdomen or thigh at least 45 minutes before sexual activity by the woman. The effect will persist for several hours. The dosage will remain the same, according to the Cleveland Clinic.

Key dosing rules for women:

• One dose per 24 hours, maximum

• Up to eight doses per month

• Inject 45 minutes before sexual activity

• Switch injection sites each time

This is the same dosage as used in the Phase 3 RECONNECT trials of approximately 1,200 premenopausal women. Kingsberg and his colleagues published the results of the trials in Obstetrics & Gynecology in 2019, and substantial benefits were noted in sexual desire, along with a decrease in distress, over the course of 24 weeks. Higher doses of bremelanotide were not studied to determine the effectiveness of bremelanotide for HSDD because the dosage of 1.75 mg was effective and side effects were minimal.

Do not use Vyleesi during pregnancy, lactation or if you are trying for a pregnancy. The drug is known to be harmful to unborn children.

PT-141 Dosage for Men: Off-Label Use

There is no FDA approval for PT-141 for men. No official dosage has been determined for men. Compounded bremelanotide is available at some clinics for men with mild-to-moderate erectile dysfunction (ED) but it is not approved for this purpose.

Pre-FDA approval studies of PT-141 were conducted among men having ED. In one older study, PT-141 resulted in improvement when administered at doses of more than 7 pt-141 mg via nasal spray. The nasal form of the medicine, though, resulted in dose-related increases in blood pressure, which halted its development in men, according to the NIH LiverTox database.

Clinically, providers generally begin at the same dose (1.75 mg), administered subcutaneously, for both women and men when they prescribe the hormone for off-label purposes. Some men might take it 45 minutes to 1 hour prior to sexual activity. Side effects and response may be used to adjust the dose, at the discretion of the provider.

The lack of FDA approval for men means:

• No long-term safety data for male use

• No standard dose backed by Phase 3 trials

• Variable quality from compounding pharmacies

Men should only use PT-141 under the care of a licensed medical provider. Buying PT-141 online or from unverified sources is risky and may be illegal in some states.

How to Dose PT-141 Safely

If a provider has prescribed PT-141, here is how to dose pt 141 based on FDA guidance and clinical practice.

Timing. Take the dose at least 45 minutes before expected sexual activity. The effect can begin within 45 to 60 minutes and may last several hours.

Frequency. Use only one dose in any 24-hour period. Do not exceed eight doses in a month. Taking doses too close together can cause larger rises in blood pressure, the Mayo Clinic warns.

Injection. Inject just under the skin in the abdomen or thigh. Change the site each time. Do not inject into a vein or muscle.

Storage. Keep Vyleesi autoinjectors below 77°F (25°C). Do not freeze. Protect from light.

Skipping doses. PT-141 is used on demand, not on a daily schedule. There are no missed doses to make up.

If nausea is a problem, talk to your provider. Many people find nausea improves after the first one or two doses. Your provider may suggest an anti-nausea medication before injection if needed.

PT-141 Side Effects and Warnings

The most common PT-141 side effects from FDA clinical trials, summarized by the NIH LiverTox database, include:

• Nausea (about 40% of users, worse with first dose)

• Flushing (about 20%)

• Injection site reactions (about 13%)

• Headache (about 11%)

• Vomiting

PT-141 can briefly raise blood pressure and lower heart rate after each dose. Ambulatory monitoring showed an average rise of about 1.9 mmHg in daytime systolic blood pressure after 8 days of dosing, according to Drugs.com clinical data. Effects usually resolve within 12 hours.

A less common but important side effect is skin darkening (hyperpigmentation). This can affect the face, breasts, and gums. People with darker skin or those who use the drug daily may have a higher risk. These changes may not fully reverse after stopping, the Mayo Clinic notes.

Call your doctor right away if your systolic blood pressure goes above 180 or your diastolic above 120. Seek medical care for any allergic reaction or severe slow heartbeat.

Who Should Not Use PT-141

PT-141 is not safe for everyone. According to the FDA prescribing information, avoid PT-141 if you have any of these conditions:

• Uncontrolled high blood pressure

• Known heart disease (cardiovascular disease)

• High risk for cardiovascular events

• Severe liver disease

• Allergy to bremelanotide

• Current pregnancy or trying to conceive

Use caution if you have slow gastric emptying or take oral medications that need timely absorption. PT-141 slows digestion, which may affect how other drugs work.

Postmenopausal women should not use Vyleesi. The drug is approved only for premenopausal women, and there is no safety or efficacy data for use after menopause.

Your provider should check your blood pressure and cardiovascular health before starting PT-141. Regular follow-up may be needed during treatment.

How PT-141 Compares to Other Sexual Wellness Treatments

PT-141 works differently from common ED medications. PDE5 inhibitors like sildenafil (Viagra) and tadalafil (Cialis) relax blood vessels to improve blood flow to the genitals.

PT-141 acts in the brain to boost sexual desire. This makes it useful for low desire, not just performance issues. The two types of drugs can sometimes be used together under medical supervision, especially in men with both desire and erection concerns.

For women with HSDD, the main FDA-approved options are flibanserin (Addyi) and bremelanotide (Vyleesi). Addyi is a daily pill; Vyleesi is used on demand. For wellness tracking tools, see meetaugust.ai.