Generic drugs are medications that have nearly the same chemical formula as their brand name drug counterparts, but can be produced by any drug manufacturer in the world. A generic drug comes into existence when the patent for the brand name drug expires. They are almost always just as effective as their brand name counterparts, 시알리스 가격 but are considerably cheaper because the larger pharmaceutical companies have already paid for the overhead necessary or research.
Some of the more popular generic drugs are those that help to enhance sexual performance. There were millions of visits to doctor's offices from people inquiring about Viagra. In time, other drugs that performed a similar function arose such as Cialis and 시알리스구매사이트 Levitra. The patent has expired on these name brand drugs and now generic alternatives are available.
Viagra is also known generically as sildenafil citrate.
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