By controlling the enzyme, sildenafil helps to maintain an erection after the penis is stroked. Sildenafil Viagra. You can take this medicine with or without food 30 minutes before sex, depending on the dose. Take sildenafil exactly as directed. If you become pregnant while taking sildenafil, call your doctor. · Viagra is meant to be used as a long-term treatment. If you and your doctor determine that Viagra is safe and effective for you, you’ll likely take it long term. Other medical conditions you. · a light-headed feeling, like you might pass out. Common sildenafil side effects may include: flushing (warmth, redness, or tingly feeling); headache, dizziness; heartburn, nausea, or upset stomach. abnormal vision (blurred vision, changes in color vision) runny or stuffy nose, nosebleeds; sleep problems (insomnia); or. Viagra Viagra – Uses, Side Effects, and More Generic Name (S): sildenafil Uses Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).
