Generic viagra

A generic viagra is a pill which is bioequivalent to a brand name viagra with respect to pharmacokinetic and pharmacodynamic properties, but is normally sold for a lesser charge. By extension, therefore, generic viagra are equal in dose, strength, route of administration, safety, efficacy, and intended apply. Generic viagra contains the same active ingredient at the same strength as the "innovator" brand, be bioequivalent, and are required to meet the equal pharmacopoeial requirements for the preparation.

Reduced Cost

The principal reason for the reduced cost of generic viagra is that these are manufacturered by smaller pharmaceutical companies which do not invest in studies and development into new medications. The significant studies and development costs incurred by the large pharmaceutical companies in bringing a new drug to the market is often cited as the reason for the high cost of new agents - they wish to recover these costs before the patent expires. Generic viagra manufacturers do not incur these costs, with bioequivalence testing and the actual manufacturing process costing relatively little, and are able to price significantly less than the "innovator" brand.

Legality

Generic viagra could be legally produced for drugs where: 1) the patent has expired, 2) the generic company certifies the brand companies patents are either invalid, unenforceable or will not be infringed, 3) for tablets which have never held patents, or 4) in countries where a patent(s) is not in force. Thus, in some cases, the generic viagra is actually the brand product but inside a different box. It is also becoming popular for the large pharmaceutical companies to preempt the expiry of their patent by producing their own generic product, or licence their own product to be branded by generic companies. The expiration of a patent removes the monopoly of the patent holder on medication sales licensing.

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