Even when a drug is approved for specific purposes in other countries, a drug still needs to go through clinical trials, even when they're used in other countries, for whatever illnesses they're used to treat in the other countries, before they can be approved by the FDA for use in this country. Many times drugs that are commonly used in other countries don't even get to the clinical trial phase because there are already so many drugs on the market that are already being used in the US for whatever illness/condition the drug treats. And as Pledge mentioned, sometimes it's also an issue with the patent.
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Posted 14 Apr 2010 • 1 answer