PT 141 Peptide Therapy for Enhanced Libido Lifeforce Peptide PT 141 for Erectile Dysfunction and Male Sexual Health PT 141 Side Effects, Duration, & Benefits Invigor Medical PT 141 (Bremelanotide): How It Works For Sexual Arousal PT 141 is discussed for sexual dysfunction in both men and women. Unlike blood flow focused approaches, it works centrally by modulating neurochemical signaling involved in