· a light-headed feeling, like you might pass out. Common sildenafil side effects may include: flushing (warmth, redness, or tingly feeling); headache, dizziness; .This boosts blood flow and helps you get an erection from sexual activity. These are commonly prescribed for an enlarged prostate or male pattern baldness. In many of the studies, of both fixed dose and titration designs, daily diaries were kept by patients. This medicine can interact with other medicines and supplements, causing potentially serious side effects. This can happen if you are sick with fever, diarrhea, or vomiting; sweat a lot; or do not drink enough liquids. How should this medicine be used? It is thought that this reduced sales over the Internet and was safer as males could be referred for medical advice if appropriate.The Savings Offer and Program expire on 12/31/ For further information, call , visit , or write: Viatris Inc., P.O. Box , Mission, KS Eligible patients may save on their VIAGRA® (sildenafil citrate) prescription with the VIAGRA savings card. In , a meta-analysis of trials determined that while Viagra is the most effective of the various ED drugs on the market, it also has the highest incidence of side effects—headache, upset stomach, vision loss, blue-tinged sight, back pain, muscle pain, nausea, and dizziness, just to name a few common ones. Sildenafil citrate is a white to off-white crystalline powder with a solubility of mg/mL in water and a molecular weight of VIAGRA is formulated as blue, film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg and mg of sildenafil for oral administration.Pharmacokinetic data from patients in clinical trials showed no effect on sildenafil pharmacokinetics of CYP2C9 inhibitors such as tolbutamide, warfarin , CYP2D6 inhibitors such as selective serotonin reuptake inhibitors, tricyclic antidepressants , thiazide and related diuretics, ACE inhibitors, and calcium channel blockers. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. These patients had erectile dysfunction at baseline that was characterized by median categorical scores of 2 a few times on principal IIEF questions. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. The patient addressed both questions at the final visit for the last 4 weeks of the study.