If I’m assigned to a post that doesn’t have a health unit where would I get routine follow up for my hypertension and high cholesterol?

There may be adequate health services, including a laboratory, locally where you could obtain the necessary care. Depending on the frequency of the follow up you require, you may also wish to consult your personal health care provider in the U.S. while on leave, or at a reputable medical facility outside of the U.S.