86% average discount. Hypertension. 74% average discount. Urinary Tract Infection. 67% average discount. Based on the average user savings between January and September Search for your prescription on our site or mobile app to see how .Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. The following nonprescription or herbal products may interact with sildenafil: cimetidine Tagamet HB , St. Sildenafil usually should not be taken more than once every 24 hours. Especially tell your healthcare provider if you take any of the following: medicines called nitrates medicines called guanylate cyclase stimulators such as Adempas riociguat medicines called alpha-blockers, such as Hytrin terazosin HCl , Flomax tamsulosin HCl , Cardura doxazosin mesylate , Minipress prazosin HCl , Uroxatral alfuzosin HCl , Jalyn dutasteride and tamsulosin HCl , or Rapaflo silodosin. What side effects can this medication cause? Is 20mg of Cialis better than mg of Viagra? Do not stop taking sildenafil without talking to your doctor.According to price-comparison site , generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with more than $50 per. The dose of Cialis you need will depend on whether you’re taking it daily or as needed. Daily doses are often between and 5 milligrams (mg). The as-needed dose is usually 10 mg but can range from 5–20 mg. The typicaldose of Viagra is 50 mg. However, the dosage can range from 25– mg. Compare prescription drug prices and find coupons at more than 70, US pharmacies. Save up to 80% instantly!If you prefer, you may contact the U. Before taking sildenafil, tell your doctor and pharmacist if you are allergic to sildenafil, any other medications, or any of the ingredients in sildenafil tablet or suspension. However, the dosage can range from 25— mg. The products discussed in this site may have different product labeling in different countries. Both medications are generic now and can be found at discounted rates, making them more accessible to the public than ever before.