DefinitionHepatitis is inflammation of the liver.Causes, incidence, and risk factorsThe disease can be caused by:Infections from viruses (such as hepatitis A, B, or C), bacteria, or parasitesLiver damage from alcohol or poisonous mushroomsMedications, such as an overdose of acetaminophen, which can be deadlyImmune cells in the body attacking the liver and causing autoimmune hepatitisMedications that can cause damage to the liver include methyldopa (used uncommonly for high blood pressure), isoniazid for tuberculosis, seizure medications (like valproate and phenytoin), chlorpromazine, amiodarone (for irregular heart rhythm), and certain antibiotics (including trimethoprim-sulfamethoxazole and erythromycin). If you need to take any of these, your doctor may need to check your liver function.