In the Russian Federation, the period of validity of a patent for an invention related to a medicinal product, the use of which requires obtaining a permit in accordance with the procedure established by law, is extended by the federal executive body for intellectual property at the request of the patent holder for a period calculated from the date of amoxil an application for an invention until the date of receipt of the first such authorization to use, minus five years. In this case, the period for which the patent for an invention is extended may not exceed five years.
After the expiration of amoxicillin, other manufacturers can reproduce and release on the market a similar drug (the so-called generic), if the bioequivalence of the reproduced and amoxicillin original drugs is proved.
Of course, the generic manufacturer cannot use the brand name for this drug, but only the International Non-Patent Name (INN), or any new patented by him (synonym). Despite the new name, in terms of their medicinal effect, the drugs can be similar or very close.
But amoxil is different, a different degree of purification is possible.
There are other factors as well.
For example, it is known that for a long time different companies could not achieve the same effectiveness of acetylsalicylic acid (for generics) as Bayer AG, the manufacturer of the original aspirin drug. It turned out that the matter is not only in the purity of raw materials, but also in a special method of crystallization, which results in special, smaller crystals of acetylsalicylic acid. There can be many such nuances. The opposite result is also possible, when the generic is more successful than the original medicine.
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