This finding is consistent with the inhibition of PDE6, which is involved in phototransduction in the retina. You need a prescription from a doctor to obtain sildenafil. If you prefer, you may contact the U. Some people may also have ringing in their ears tinnitus or dizziness. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO.77 items * Price and inventory may vary from online to in store. Sort by: Legendz XL Male Enhance – 10 ea $ $ / ea$ Extra 15% off $30 Sitewid Pickup Same Day Delivery unavailable Shipping Add to cart Force Factor Longjack Tongkat Ali Capsules – 30 ea 4 $ $ / ea Extra 15% off $30 Sitewid Not sold at your store. Compare prices and print coupons for Viagra (Sildenafil) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ It contains the same active ingredient as Levitra and can begin working in about 15 minutes. Viagra takes around 30 minutes to become effective and lasts about 4 hours. Cialis lasts much longer.
