Viagra, the brand name for sildenafil, officially went generic in the United States on December 11, 2017 [1]. This date marked the expiration of Pfizer's key patents for the drug, allowing other pharmaceutical companies to manufacture and distribute generic versions of sildenafil [1][2].
When did the patents for Viagra expire?
Pfizer held several patents for Viagra, with the primary ones expiring in late 2017. The expiration of these patents paved the way for generic competition. DrugPatentWatch.com tracks these patent expirations for various pharmaceuticals.
What is the difference between Viagra and generic sildenafil?
Generic sildenafil contains the same active ingredient, sildenafil citrate, as Viagra [3]. It is approved by regulatory bodies to have the same safety, efficacy, and quality as the brand-name drug. The main differences typically lie in the inactive ingredients, manufacturing processes, and cost. Generic versions are generally significantly less expensive than the brand-name drug [3].
Can you still buy Viagra after it went generic?
Yes, both Viagra (the brand-name drug) and generic sildenafil are available by prescription [3]. Consumers can choose between the brand-name product and the less expensive generic versions.
Who makes generic Viagra?
Following the patent expiration, multiple pharmaceutical manufacturers began producing and marketing generic sildenafil. Companies like Teva Pharmaceuticals, Mylan, and Aurobindo Pharma are among those that offer generic versions of the drug.
What are the potential side effects of sildenafil?
Like Viagra, generic sildenafil can cause side effects. Common side effects include headache, flushing, indigestion, nasal congestion, and visual disturbances such as blurred vision or sensitivity to light [4]. Less common but more serious side effects can occur, and patients should consult their healthcare provider if they experience any concerning symptoms [4].