Is biaxin (clarithromycin) XL used for tooth infections?

If Rx by Ur dentist. I would follow the instructions from ur dentist or oral surgeon, don't self medicate.
Not really. This is not the usual choice for tooth infection, pls see yoir dentist to have a complete evaluation. Biaxin (clarithromycin) is better used for other problems such as sinusitis and bronchitis.