As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION. Tadalafil Cialis. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. 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 does Viagra cost? Costs of prescription drugs can vary depending on many factors. These factors include what your insurance plan covers and which pharmacy you use. The price you’ll pay for sildenafil may vary based on the strength and form of the drug your doctor prescribes for you. The price may also depend on which condition . Viagra Coupons, Prices, and Savings Card. Generic Names: Sildenafil Citrate. Brand Names: Revatio. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn more about Viagra oral. 1. This is a generic drug. Even if this drug is covered by Medicare or your insurance, we recommend you compare prices.