Azithromycin

Clarithromycin

Erythromycin

Fidaxomicin

Streptococcal infections Streptococcal Infections Streptococcal infections are caused by any one of several species of Streptococcus. These gram-positive, sphere-shaped (coccal) bacteria (see figure ) cause many disorders, including... read more

Syphilis Syphilis Syphilis is a sexually transmitted infection caused by the bacteria Treponema pallidum. It can occur in three stages of symptoms, separated by periods of apparent good health. Syphilis... read more

Respiratory infections

Mycoplasmal infections Bacterial causes of pneumonia Community-acquired pneumonia is lung infection that develops in people who are not patients in a hospital, usually in people with normal (competent) immune systems, or in those who are immunocompromised... read more

Lyme disease Lyme Disease Lyme disease is a tick-transmitted infection caused by Borrelia species, primarily by Borrelia burgdorferi and sometimes by Borrelia mayonii in the United States. These... read more

For azithromycin: Chlamydial infections Chlamydia and Other Nongonococcal Infections Chlamydial infections include sexually transmitted infections of the urethra, cervix, and rectum that are caused by the bacteria Chlamydia trachomatis. These bacteria can also infect... read more of the reproductive organs and urinary tract

For fidaxomicin: Used only for Clostridioides difficile Clostridioides (formerly Clostridium) difficile–Induced Colitis Clostridioides difficile (C. difficile)–induced colitis is an inflammation of the large intestine (colon) that results in diarrhea. The inflammation is caused by toxin produced... read more

Abdominal pain, nausea, vomiting, and diarrhea (especially at higher doses)

Jaundice*

Abnormal heart rhythms Overview of Abnormal Heart Rhythms Abnormal heart rhythms (arrhythmias) are sequences of heartbeats that are irregular, too fast, too slow, or conducted via an abnormal electrical pathway through the heart. Heart disorders are... read more (arrhythmias)*