viagra side effect headache

Learn the potential medication side effects and drug interactions for the drug . VIAGRA, PLACEBO. N=734, N=725. Headache, 16%, 4%. Flushing, 10%, 1% . Additional side effects associated with Viagra include:. Headache. Flushing. Upset stomach. Stuffy nose. Urinary tract infection . Sildenafil citrate, sold under the names Viagra, Revatio and under various other .. Common side effects include sneezing, headache, flushing, dyspepsia, . Some of these side effects are more likely to occur with higher doses. The most common side effects of Viagra are headache, flushing of the face, . Learn what the common side effects of taking Viagra are. The most common side effects are headache, a flushed face and nausea. Some men note a decrease in . Viagra has been shown to have the following side effects in some people:. PRE-MARKETING STUDIES. Headache / Flushing / Dyspepsia / Nasal Congestion . The most common side effects of taking Viagra are minor and they include headache, flushing, upset stomach, abnormal vision, diarrhea, dizziness, and rash. .