Bremelanotide PT 141 Men Erectile Dysfunction Randomized Trial: What the Evidence Shows Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn PT 141 Side Effects: What You Need to Know Before Starting Double blind, placebo controlled evaluation of the safety, pharmacokinetic properties and pharmacodynamic effects of intranasal PT 141, a melanocortin receptor agonist, in healthy males and patients with mild to moderate erectile dysfunction