Trimazosin Other Interactions Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. Leukemia blood related cancer or Multiple myeloma blood related cancer or Sickle-cell anemia blood disorder —Sildenafil should be used with caution in these patients as problems with prolonged erection of the penis may occur. It continues to work for up to 4 hours, although its action is usually less after 2 hours. This medicine comes with a patient information leaflet. Its effects might last longer if you have mild to moderate ED. · 86% average discount Hypertension 74% average discount Urinary Tract Infection 67% average discount Based on the average user savings between January . Sildenafil Prices, Coupons and Patient Assistance Programs. Sildenafil is a member of the agents for pulmonary hypertension drug class and is commonly used for Erectile Dysfunction, Pulmonary Arterial Hypertension, and Sexual Dysfunction – SSRI Induced.. Brand names for sildenafil include Viagra, Revatio, and Liqrev. The cost for sildenafil . The prices listed are the most recent cash prices. These prices: Do not account for prescription insurance and co-pays; Generic Alternative: Sildenafil Citrate Mg Tab Amne. Mfr. AMNEAL PHA. 10 Tablets. 20 Tablets. 30 Tablets. Name. Mfr. 10 Tablets. 20 Tablets. 30 Tablets.