WebJun 24, · Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or .Place the tip of the syringe into you or your child’s mouth and point it towards the cheek. National Library of Medicine. This medicine works best when you take it on an empty stomach an hour before sex. Do not press on the plunger of the syringe. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. has been visited by K+ users in the past monthMany Americans pay far too much for their prescriptions. We’re here to help. Compare pharmacy prices in your area, get the free coupon, & see how much you can save!Prescription Discounts · Trusted by Millions · Save Up to 80%The lowest prices on specific drugs – Family Circle. WebSep 12, · Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult . WebViagra vs Cialis? About 75 to 85 percent of the time both Viagra and Cialis are effective drugs for erectile dysfunction. Read more. Sildenafil Side Effects. Dizziness, headache, flushing, or stomach upset may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may.If your dose is different, do not change it unless your doctor tells you to do so. Push the plunger of the syringe, then insert the tip into the bottle while holding the bottle upright on a flat surface. Children 1 year of age and older weighing 20 to 45 kg—20 mg 3 times a day. However the dose is usually not more than 40 mg 3 times a day. The as-needed dose is usually 10 mg but can range from 5—20 mg. Emling S.