Sure, if you want to order your meds from online pharmacies based in India and Vanuatu, you can (and I personally know people who order cyproterone acetate from these pharmacies because it's the best oral anti-androgen in existence but hasn't been approved by the FDA mostly out of laziness/cheapness), but you can expect to pay a lot of money. Oh, and you run the very small risk of having your meds confiscated by customs (they legally can't take action against you, because buying isn't illegal, but they can confiscate it because selling is illegal), but thankfully the government only has the resources to actively confiscate meds from online pharmacies one week per year (look up "Operation Pangea").
Even for a drug that's approved by the FDA, you'll be paying more to order the meds online than you will to go to a doctor, pay for the visit out of pocket, and have the prescription filled at Walmart (I have personal experience with this: because it's a pain in the ass to find doctors who will treat trans people, a lot of us start off ordering our meds from online pharmacies before we find a doctor, and it's not a huge deal because dosages are standardized, you can order private blood tests from certain labs, and official clinical guidelines are freely available for download -- but it's always cheaper to go through a doctor even if you're self-paying, the problem is finding a doctor in the first place).