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Old 01-13-2013
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Drug MDR-TB (new FDA approved drug )

Name : Bedaquiline (a.k.a Sirturo )
structure : diarylquinoline
MOA : affects the proton pump for ATP synthase, which is unlike the quinolones, whose target is DNA gyrase.
Toxicity : bad arrythmia and cardiac arrest .
Indications approved for : Multi drug resistand tuberculosis or even extensively drug resistant tuberculosis .
definition of multi drug resistant tuberculosis = defined as tuberculosis that is resistant to at least isoniazid (INH) and rifampicin (RMP), the two most powerful first-line treatment anti-TB drugs.
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Old 01-13-2013
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but here's some food for thought..

If your taking your test within the next 3-4 months the test is already made.
Yes, new drugs will be relevant in the near future but regarding Step 1 its more wise to go over the other 500+ drugs that are more commonly used that will definitely show up on the exam.
Drugs that were made 5 years ago still haven't shown up on step1. If you look at the USMLE website and look at the writers of the test.
They're all:
3)practicing physicians

More then likely, they will keep it to what they feel is important in regards to basic sciences that can be taught from medical literature. I'm sure the new drugs have yet to be published in any pharmacology books.

just food for thought..
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