Sildenafil usually should not be taken more than once every 24 hours. If you have an erection that lasts more than 4 hours, get medical help right away. Shake the liquid well for 10 seconds before each use to mix the medication evenly. Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient. Brand names Why is this medication prescribed?AdIt’s super shopping time. Don’t miss out. It’s super shopping time. Don’t miss out on special Black Friday offer!test1.ru has been visited by K+ users in the past monthBrands: Dick’s Sporting Goods, Bass Pro, Kohl’s, Macy’s. 1 day ago · Cost: If the price for branded Viagra is outside of your budget, Lemonaid’s $2 sildenafil pills are some of the lowest priced Viagra alternatives that we’ve found. Product details Usage: take. Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose). Written by Brian Leonard, PharmD, BCACP, BCGP.