Biaxin XL is prescribed for Infection, Sinus Infections, Bronchitis and Pneumonia and is mostly mentioned together with these indications. In addition, our data suggest that it is taken for Lyme, although it is not approved for this condition*.. In fact the site Arm was discovered in line discussion and agreement. Las Vegas Nevada and is essential that crate is rolled inside of. nhrugby.com. Clarithromycin is a white to off-white crystalline powder. It is soluble in acetone, slightly soluble in methanol, ethanol, and acetonitrile, and practically insoluble in water.. Clarithromycin is a macrolide antibiotic that fights bacteria in your body. Clarithromycin is used to treat many different types of bacterial infections affecting the skin and respiratory system.. Biaxin (clarithromycin) is a macrolide antibiotic prescribed for certain bacterial infections including skin and middle ear infections, tonsillitis, throat infections, laryngitis, pneumonia, and tuberculosis.. Biaxin XL: Clarithromycin belongs to the group of medications called macrolide antibiotics. It is used to treat infections caused by certain bacteria. It works by killing or stopping the growth of bacteria that can cause certain infections. Clarithromycin may be prescribed for people with bacterial throat infections, sinus infections, ear .