The FDA's regulations are not as strict for this stuff as for the drugs sold in stores. The FDA does not require that the drugs be labeled as "prophylactic," so you can buy them as you please.
So, you can buy something for yourself and someone else if you'd like, knowing the manufacturer's claims.
But it can be dangerous. The pills can be a real problem for people who already have problems with their sex organs. There are many other things you can do, too. For example, condoms have other uses, like for people who have trouble getting pregnant or are just having difficulty getting an erection. The FDA also says the drugs have to be taken as directed, and you should know the risks before you start taking them. So what are you supposed to do with sex hormones? The FDA says you should get a blood test, and it's best to consult a doctor about this if you're pregnant, or if you're not sure whether it's safe for you. Here are the most commonly used drugs, according to the FDA: Tadalafil — A type of male birth control pill that's used to treat erectile dysfunction. It is also used to treat a rare form of cancer called prostate cancer and helps with weight loss.