Can someone take viagra (sildenafil) if you have atrial fibrillation?

Yes: As long as you aren't on nitrates.

Yes: Unless you're taking nitrates for some other condition, viagra should be fine. I recommend my patients avoid Levitra (vardenafil) (tadalafil) because it can interact with certain rhythm drugs many docs use for afib. Viagra and Cialis don't have this effect. Nobody's ever died from the interaction but better to avoid the issue. While you're at it, look into the differences in cost and action of viagra v cialis.