I will not go into detail on what I understand to be the pragmatic considerations here, since the lesswrong morality encourages a more conservative approach to choosing what to do.

The life-extentionists over at imminst.org tend to be experienced in acquiring whatever they happen to need to meet their health and cognitive enhancement goals. They tend to give a fairly unbiased reports on the best way to go about getting what you need, accounting for legal risks, product quality risks, price and convenience.

I do note that when I want something that is restricted I usually just go tell a doctor that "I have run out" and get them to print me 'another' prescription.

In the USA it's no problem to order unscheduled prescription drugs over the internet. Schedule IV drugs can be imported, but customs occasionally seizes them with no penalty for the importer. No company that takes credit cards will ship Schedule II or Schedule III drugs to the USA; at least not one that will be in business for more than a month or two.

I believe it's all easier in Europe but I don't know for sure. PM for more info.