Well, since you can't easily send prescription drugs internationally (at least without way more trouble than it is worth). You are going to have to deal with this irregardless of whether you do or do not get a check up. I would suggest stocking up when you can get it, and if you need to, get checked up by a doctor in country and fill your scrips that way. Just ask other expats who to go to. There is a reason you are supposed to get a check up every year. On the other hand, in most countries cash is quicker than a checkup....
EDIT BY CD: I do not know if you are a female, so I did not delete this post. If you are not, please refraim from commenting in the female forum. THis is for the girls.