Here is a good place to look for the possible side effects of medications: webmd.com/drugs/2/index

You put in the name, and you can find out maybe more than you ever want to know. In addition, there is an interaction checker, so you can see what drugs and/or supplements to be cautious about taking together.

A couple of cautions:
Please don't flatly refuse medications because you read about potential side effects - especially those listed as rare or uncommon. Your physician has already determined there is more benefit than risk when they choose the med. Discuss your concerns.
If you stop a prescribed med, let your provider know, and why, so you can discuss whether you must taper off, and whether there is a good substitute for you.
Possible adverse interactions are a VERY good reason to tell your provider every med, prescription or not and every supplements you use, as well as any tobacco, alcohol, THC/CBD or other drugs you use.
Pharmacists are excellent at spotting incompatible meds, so keeping all prescriptions with one pharmacy is a good idea.
Finally, if you have a problem with metoprolol, there are a number of alternatives. Please ask for one if tinnitus is bothering you. Remember, untreated high blood pressure is known as the "silent killer"

Sue