No, every brand-name drug does not have a common counterpart. This is especially the situation with newer drugs such as Viagra, Cialis, and Levitra. These brand-name formulas are patent-protected for 20 years from the day of the submission of the patent. That means that no other medication company can introduce a “common” variation of any of these drugs while its patent holds. This allows the original designer of the brand-name drug to recoup r & d prices.
When the patent for a specific medicine ends, other businesses– including the original programmer of the brand-name drug– can apply to the FDA to offer common variations. 씨알리스 복용법
This additionally describes why legitimate common medications are cheaper than their brand-name equivalents. A generic manufacturer does not need to recuperate research and development costs and can as a result sell them for much less. This additionally tends to drive down the price of the brand-name variation also.