I am on setraline. the other day i took a viagra (sildenafil) and during sex i became extremely dizzy and light headed. i hope this was a one off.

Viagra (sildenafil): While viagra (sildenafil) is generally a very safe drug, it does have side effects. It is a vasodilator and is capable of lowering your blood pressure and causing dizziness. Never take it with Nitroglycerin medications. The drop in blood pressure can be quite serious in a heart patient. Likely has nothing to do with the setraline. If symptoms persist discuss it with your physician.