Rare is the prescription medication that doesn’t have at least a few adverse side effects, and Viagra is no exception. However, its side effects are generally mild and tend to disappear the longer you take the drug. The most common of these side effects include back pain, diarrhea, dizziness, flushing, headache, muscle ache, nausea, runny or stuffy nose, and upset stomach.
The little blue pill has been known to cause some more serious side effects, but these, fortunately, are rare. Some men have experienced a sudden decrease or total loss of hearing or vision after taking Viagra. Others have reported an erection that lasted for four or more hours. If you should experience any of these more serious side effects, you should seek medical attention immediately.