Hours after Teva won its appeal before the high court, it posted notice of its own generic version on its site — the first commercial challenge to Pfizer’s year Viagra monopoly. The high court sided with Teva Canada’s challenge of the legitimacy of the patent, paving the way for generic versions. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. If you are taking sildenafil for PAH, take the missed dose as soon as you remember it. · Teva’s version of sildenafil debuted at an average cash price of around $30 per pill, roughly 50% cheaper than brand-name Viagra. Since then, more manufacturers have brought generic versions of Viagra to market, bringing prices down even further. According to price-comparison site test1.ru, 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. 1 day ago · You can purchase a one-time order or sign up for a subscription plan that sends you a monthly supply of the pills in discreet packaging. Cost: Branded Viagra is available starting at $ per dose.