Thanks to all of you who answered. Appreciate it.

Answer:

(I looked this up for personal reasons just a few days ago, link is provided)
The expiration date doesn’t really indicate a point at which the medication is no longer effective or has become unsafe to use. Medical authorities state expired drugs are safe to take, even those that expired years ago. A rare exception to this may be tetracycline (shows up over n over again on medical board exams). It’s true the effectiveness of a drug may decrease over time, but much of the original potency still remains even a decade after the expiration date. Excluding nitroglycerin, insulin, and liquid antibiotics, most medications are long-lasting. Placing a medication in a cool place, such as a refrigerator, will help a drug remain potent for many years.
So to answer your questions. Yes it is perfectly fine to take Viagra that is past it’s expiration