Although not all of these side effects may occur, if they do occur they may need medical attention. Your doctor may adjust your dose if needed. Rarely reported side effects include: an erection that will not go away priapism. Remove the syringe from the bottle. Do not take other medicines unless they have been discussed with your doctor.Cost Overdose Ask your doctor Q&A Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a .  · Sildenafil (Oral Route) Description and Brand Names Before Using Proper Use Precautions Side Effects Products and services Proper Use Drug information . RESOURCES GETTING STARTED WITH VIAGRA Your doctor has determined that VIAGRA may be right for you. Follow his or her instructions carefully to help you get the .