I just used Stendra. Worked quickly and very well. No side effects! Loved it ## Hello, BB! How are you? Stendra is listed as containing the active ingredient Avanafil, which is listed by the FDA as being used to treat ED and it may cause side effects, such as nausea, dizziness, headache, stuffy nose, blurry vision and priapism. I'm glad that it worked so well for you. Was this prescribed for you? ## yes--my doctor prescribed it, after my insurance company said it was cheaper than Viagra