As far as I'm aware they just check for Aids/HIV, and drug/alcohol abuse. They probably also check for Haemoglobin count (Anemia) and cholesterol levels like the class 1. They will no doubt find out about your medication from your doctor's records anyway, but I wouldn't worry. I've read a few threads on here where people are on medication for certain conditions and it doesn't necessarily affect the outcome of the medical. Sorry I can't be more specific but I'm not a doctor !!! Just trying to ease the anxiety !!
NB