I've only used pt141 once, but I've used melanotan II for 10+ years. They're similar. Over 500mcg hits you in minutes. A weird feeling that turns into nausea, yawning, and sickening erections (3+ hours). You don't need stimulation. It's a forced erection. High doses flush you all over.
I don't agree with small doses if it's like MTII. The effects wear off. Eventually it stops working if you take it daily. IME, take a good dose when you need it. Sides, but potent effects...
Maybe you got a bad peptide. Or use MTII. You'll tan. Not great for sex, takes hours to kick in, and the nausea is a turnoff. Working out is tough the next day due to the long half life. Also raises blood pressure. Anyone else get nausea with PT-141?