Can be done. May need to shop around different banks, different branches. Probably someone here can give you suggestion of which bank/branch. You may want to list your location in your post (Chaing Mai, BKK, etc...)
I have a friend in a similar situation. he is from the US so meds are stupid expensive but insurance pays for them. Ultimately he can buy locally not exactly the same thing and pays. Or he ships from US. When he ships he is clever and packages them with clothes and what not. I don't recommend this it can be trouble for you.