Lovers Peptide - PT-141 1x Vial 10mg PT-141 1x Vial 2ml Bacteriostatic water. DIRECTIONS FOR USE: PT-141 should be used at least 30-40 minutes before anticipated sexual activity. 1iu of PT-141 as a test dose or on first use. (female) 2iu of PT-141 as a standard dose (male) 3iu of PT-141 as a strong dose for a strong effect Only 1 dose per 24 hours or no more than 8 doses per month is recommended.