Dear stdl, This is one of those questions that should be easily answered but, unfortunately, is not . Please try to follow my reasoning. Whether or not you may write Cefotaxim two times a day as Cefotaxim 2x per day depends upon who will be reading what you write.
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studentmdlCefotaxim was administered 2x per day.Never write as 2x per day. You need to elaborate 2x as 2 times. You also have to mention the period of treatment.