The doctor prescribed medication to correct an issue. Failing to follow the doctor’s order is failing to follow an order and if she gets sick again she has caused herself injury. Either way both actions are most likely punishable under UCMJ. You mentioned AT so I am assuming you are Guard or Reserve. Was the doctor a civilian or military doctor? If he was a civilian, you need to send her to a military doctor as the military usually does not recognize civilian orders. The military doctor will then put limitations into a profile. If it was a military doctor the prescription is an order!