Thanks for your health concerns. All the medications that your father in law is taking are heart medications in people who might have obstructed arteries in the heart. However, as far as I can tell from the short work up performed there was no definite evidence of these; these medications can have side effects such as reflux, gastritis
, etc, which could correlate with his recent symptoms; thus, my best recommendation is to see a cardiologist first to determine if he really needs those medications; until he has had the evaluation though, should not discontinue.
Dr Brenes-Salazar MD
Mayo Clinic MN