I'm currently on Viibryd (vilazodone hydrochloride). Is it ok to take the occasional Excedrin or Advil? Tylenol doesn't really help my headaches.

Occasional ok. Occasional Motrin is ok. However ssris affect platelet aggregation which can lead to easy bruising. Take Motrin with food or milk to avoid developing a gastric ulcer. If you are having migraines often consider Topamax (topiramate) or elavil for prevention.