Sildenafil usually should not be taken more than once every 24 hours. What special precautions should I follow? If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil. Tell your doctor or pharmacist if you are taking nitrates medications for chest pain such as isosorbide dinitrate Isordil , isosorbide mononitrate Monoket , and nitroglycerin Nitromist, Nitro-Dur, Nitrostat. Ask your pharmacist for a list of the ingredients. The products discussed in this site may have different product labeling in different countries. Take sildenafil as needed before sexual activity.Brand names for sildenafil include Viagra, Revatio, and Liqrev. The cost for sildenafil oral tablet mg is around $10 for a supply of 2 tablets, depending on the pharmacy you visit. not an insurance plan. Valid at all major chains including Walgreens, CVS Pharmacy, Target, WalMart Pharmacy, Duane Reade and 65, pharmacies nationwide. Price and coupons for 30 Tablet of Sildenafil Citrate mg found near We’re sorry we couldn’t find any coupons in your area. Please try another search or try again later. Have questions? FAQ. Brand names for sildenafil include Viagra, Revatio, and Liqrev. The cost for sildenafil oral tablet mg is around $10 for a supply of 2 tablets, depending on the pharmacy you visit. Quoted prices are for cash-paying customers and are not valid with insurance plans.