<unk>  is primarily used to treat a number of bacterial infections including pneumonia, Helicobacter pylori, and as an alternative to penicillin in strep throat. Other uses include cat scratch disease and other infections due to bartonella, cryptosporidiosis, as a second line agent in Lyme disease and toxoplasmosis. It may also be used to prevent bacterial endocarditis in those who cannot take penicillin. It is effective against upper and lower respiratory tract infections, skin and soft tissue infections and helicobacter pylori infections associated with duodenal ulcers. Spectrum of bacterial susceptibility Aerobic Gram-positive bacteria * Staphylococcus aureus * Streptococcus pneumoniae * Streptococcus pyogenes Aerobic Gram-negative bacteria * Haemophilus parainfluenzae * Haemophilus influenzae * Moraxella catarrhalis Helicobacter * Helicobacter pylori Mycobacteria Mycobacterium avium complex consisting of: * Mycobacterium avium avium * Mycobacterium intracellulare Other bacteria * Chlamydia pneumoniae * Mycoplasma pneumoniae Safety and effectiveness of<unk>  in treating clinical infections due to the following bacteria have not been established in adequate and well-controlled clinical trials: Aerobic Gram-positive bacteria * Streptococcus agalactiae * Streptococcus (Groups C, F, G) * Viridans group streptococci Aerobic Gram-negative bacteria * Bordetella pertussis * Legionella pneumophila * Pasteurella multocida Anaerobic Gram-positive bacteria * Clostridium perfringens * Peptococcus Niger * Cutibacterium acnes Anaerobic Gram-negative bacteria * Prevotella melaninogenica (formerly Bacteroides melaninogenicus)
Clarithromycin
Erythromycin
Cethromycin
Natamycin
Paromomycin
Clindamycin
Meropenem
Anisomycin