However the dose is usually not more than 40 mg 3 times a day. Sildenafil comes as a tablet and suspension liquid to take by mouth. Use protective measures and ask your doctor if you have any questions about this. You need to be sexually excited for it to work. Do not start these medications while taking sildenafil without discussing it with your healthcare provider.Compare prices and print coupons for Sildenafil (Generic Revatio and Viagra) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Welcome! You’re in GoodRx Provider Mode. Pay undefined at CVS Pharmacy with a GoodRx discount. That’s 56% off the retail price of $ CVS Pharmacy. $ retail. Save 56% $ *for free flu shot & for $5 off $20 coupon: Flu vaccine is no cost with most insurance plans. Available at most CVS Pharmacy ® and MinuteClinic ® locations when a certified immunizer is on duty. Restrictions apply. Find a CVS Pharmacy near you, including 24 hour locations and passport photo labs. View store services, hours, and information.