Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in is also used to treat pulmonary arterial hypertension, a serious heart and lung .So make sure you read the leaflet. Answer: Viagra is generally thought to be low risk. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. Some men get side effects from using Viagra, but most of the time these are mild and disappear after a couple of uses. If you take certain medications or have a medical condition, it might not be suitable for you. Taking acetaminophen and drinking plenty of water can help with a headache if Viagra otherwise works fine.SILDENAFIL CITRATE (Generic for VIAGRA) QTY 30 • MG • Tablet • Near EDIT; Add to Medicine Chest; Set Price Alert; Select at least one Pharmacy. Enter Email . What to consider 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 . Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in is also used to treat pulmonary arterial hypertension, a serious heart and lung .The most common side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as changes in color vision such as having a blue color tinge and blurred vision; stuffy or runny nose; back pain; muscle pain; nausea; dizziness; rash. How we source info. When you and a clinician are choosing a dose, you should go for the lowest dose that you think will work. Next review due on August 01, Especially tell your healthcare provider if you take any of the following: medicines called nitrates medicines called guanylate cyclase stimulators such as Adempas riociguat medicines called alpha-blockers, such as Hytrin terazosin HCl , Flomax tamsulosin HCl , Cardura doxazosin mesylate , Minipress prazosin HCl , Uroxatral alfuzosin HCl , Jalyn dutasteride and tamsulosin HCl , or Rapaflo silodosin. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. Can you buy Viagra over the counter?