Sexual activity may be a strain on your heart, especially if you have heart disease. Sildenafil comes as a tablet and suspension liquid to take by mouth. Some medications should not be taken with sildenafil. Consult Your Physician Before purchasing Cialis or any medication online, always consult with your doctor. No more queuing up at the pharmacy or scheduling visits; with just a few clicks, your medication can be on its way to your doorstep. And as the digital age continues to expand, staying informed is the best way to ensure you benefit from the convenience without compromising on safety. The best time to take sildenafil is about 1 hour before sexual activity, but you can take the medication any time from 4 hours to 30 minutes before sexual activity.It is available in both brand and generic versions. Cialis is not covered by most Medicare and insurance plans, but manufacturer and pharmacy coupons can help offset the cost. Prices Medicare Drug Info Side Effects Images. How much does Cialis cost? expand_more. The brand version of Cialis can be expensive. Five tablets of Cialis 10 . Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the . $ (save %) local_offer_outlined Avg retail price $ medication_outlined Availability Available See GoodRx coupons warning Are you looking for information on sildenafil (Revatio) instead? What is Sildenafil (Viagra)? Drug Facts Common Brands Viagra Drug Class PDE-5 inhibitor.