Bremelanotide, Vyleesi, PT 141 - whatever you call it, it can really improve your sex life. But the side effects can suck. Nausea, aches, headaches, stuffy nose, flushing are common. The nausea can be terrible. I was fine the first three times, then the fourth time I was sick for a day. My doctor gave me Zofran, which helped, but then I got body aches and headaches. I was taking a lot of ibuprofen and still felt bad. My allergies got worse, too. It's too bad, because it really did work.