Viagra generic 2010?

When did Viagra become available as a generic medication?

Viagra, with the active ingredient sildenafil, became available as a generic medication in the United States in December 2013 [1]. This followed the expiration of Pfizer's patents for the drug.

How long did Viagra's patent protection last?

Pfizer held patents for sildenafil citrate, the active ingredient in Viagra, which provided market exclusivity for a significant period. The initial patent for Viagra was issued in 1996, and its expiration in 2013 allowed for the introduction of generic versions [2].

What is the active ingredient in Viagra and its generic versions?

The active ingredient in Viagra is sildenafil citrate. Generic versions of Viagra also contain sildenafil citrate as their active pharmaceutical ingredient [3].

Who manufactures generic Viagra?

Following the patent expiration, multiple pharmaceutical companies began manufacturing and marketing generic versions of Viagra. These manufacturers include Teva Pharmaceuticals, Mylan, and Aurobindo Pharma, among others [4].

What are the costs of generic Viagra compared to brand-name Viagra?

Generic versions of Viagra are typically significantly less expensive than the brand-name drug. This price difference is a primary driver for patients seeking generic alternatives [5].

Can I buy Viagra without a prescription?

No, Viagra (sildenafil citrate) is a prescription-only medication. It requires a doctor's evaluation and prescription due to potential side effects and interactions with other medications [6].

What are the common uses for sildenafil citrate?

Sildenafil citrate, the active ingredient in Viagra, is primarily prescribed to treat erectile dysfunction (ED) [7]. It is also used to treat pulmonary arterial hypertension (PAH) under the brand name Revatio [8].

Are there any differences in effectiveness or side effects between brand-name Viagra and generic versions?

Generic medications are required to be bioequivalent to their brand-name counterparts, meaning they have the same active ingredient, dosage form, strength, and route of administration, and are expected to produce the same clinical effect [9]. Therefore, generic Viagra is considered as effective and safe as brand-name Viagra. Potential side effects are also expected to be the same [10].

Sources:
[1] https://www.drugpatentwatch.com/drugs/viagra
[2] https://www.drugpatentwatch.com/drugs/viagra
[3] https://www.drugpatentwatch.com/drugs/viagra
[4] https://www.drugpatentwatch.com/drugs/viagra
[5] https://www.drugpatentwatch.com/drugs/viagra
[6] https://www.drugpatentwatch.com/drugs/viagra
[7] https://www.drugpatentwatch.com/drugs/viagra
[8] https://www.drugpatentwatch.com/drugs/viagra
[9] https://www.drugpatentwatch.com/drugs/viagra
[10] https://www.drugpatentwatch.com/drugs/viagra