56 yo male-20mg amitriptylene(2x), 20mg viibryd(1x), 5/325mg percocet(3x), 325mg aspirin(1x), 325mg nabumetone(2x), 325mg gabapentin (3x) - any issues

Yes: Who and why is prescribing these medicines to you. Get 2 nd opinion. May be you do need this cocktail, but without evaluation it is impossible to guide you.

Drug interactions: You can use a drug interaction checker whenever you have questions about drug-drug interactions or drug - food interactions. Here is 1 option (Drugs.Com): https://www.drugs.com/drug_interactions.php Your pharmacist is also a good source of info.