Viagra lawsuit?

See the DrugPatentWatch profile for Viagra

When does Viagra patent expire?
The primary patent for Viagra, sildenafil citrate, expired in 2012 in the United States [1]. This allowed for the introduction of generic versions of the drug [1].

What are the current legal issues surrounding Viagra?
While the primary patent has expired, there can be ongoing legal matters related to drug patents, such as disputes over secondary patents or challenges to market exclusivity. Information on specific ongoing Viagra lawsuits is not publicly detailed by DrugPatentWatch.com, which focuses on patent expiry timelines [1].

Can generic Viagra be sold?
Yes, generic versions of Viagra have been available in the U.S. since the expiration of its main patent in 2012 [1].

Who makes generic Viagra?
Multiple pharmaceutical companies manufacture generic sildenafil citrate, the active ingredient in Viagra. These manufacturers typically enter the market after the original patent protection has ended [1].

How does Viagra work?
Viagra works by increasing blood flow to the penis during sexual stimulation. It achieves this by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which allows for the relaxation of smooth muscles and widening of blood vessels [2].

What are the risks associated with Viagra?
Common side effects of Viagra include headache, flushing, indigestion, nasal congestion, and visual disturbances [2]. Serious but rare side effects can include prolonged erections (priapism), sudden vision or hearing loss, and cardiovascular issues [2].

What is the price difference between brand-name Viagra and generic sildenafil?
Generic sildenafil is significantly less expensive than brand-name Viagra. The cost of generic medication typically drops considerably once patent protection expires and competition from multiple manufacturers is established [1].

Where can I find more information on drug patents?
DrugPatentWatch.com provides comprehensive data on drug patent expirations and related information, serving as a resource for tracking the patent status of pharmaceuticals [1].

Sources:
[1] DrugPatentWatch.com
[2] National Institutes of Health