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doi:10.1186/s12967-023-04405-y Bhm, Robert C, Malhotra S, K

Whereas a PDE5 inhibitor, such as Viagra, has a vascular mechanism of action, PT-141 appears instead to act on the central nervous system specifically on the hypothalamus, which plays a key role in regulating erectile function.6 Further distinguishing it from the Viagra type is that it may initiate erections without visual sexual stimulation.7 To date, one of the most compelling studies on PT-141s efficacy for ED is a randomized, double-blind, and placebo-controlled trial published in the Journal of Urology in 2008, which involved 342 married men with ED who were nonresponsive to sildenafil (generic for Viagra)

Vyleesi (bremelanotide injection) Prescribing Information and Approval

43 In fact, MC1R activation in melanocytes themselves has been shown to activate antioxidant, DNA repair, and survival pathways