I don't know what kind of tests he is likely to order, but I would suggest that
anytime you are taking any medicines, first ask your doc about possible side
effects (and also check on-line and with your pharmacist) and what to do about
them if they do occur. If you do have any side effects (or if something happens
and you are not sure if it is caused by the medicine) call the doctor's office
(if it is serious and also after hours, tell the answering service that it is
an emergency) or, if it is bad enough, go to an ER. Some medicines can't be
stopped abruptly without causing more problems.

I use the following sites to check out meds and tests

http://www.pennhealth.com/
(click on "Health Information" in top banner for choices)

http://health.discovery.com/

http://www.merck.com/mrkshared/mmanual/home.jsp

http://www.medicinenet.com/script/main/hp.asp

http://www.labtestsonline.org/

http://www.nih.gov/

http://www.hhs.gov/

   and, for travelers

http://www.cdc.gov/travel/