Understanding Hepatitis -- the Basics
What Causes Hepatitis? continued...
Other viruses. Other viruses may also cause hepatitis. These include the Epstein-Barr virus (often associated with mononucleosis), the varicella virus (which causes chickenpox), the herpes simplex virus (HSV), and cytomegalovirus (CMV).
Although viruses are the most common cause of hepatitis, other causes include autoimmune liver disease, obesity, alcohol, toxins, or misuse of certain prescription drugs and over-the-counter drugs such as Tylenol. These forms of hepatitis can cause the same symptoms and liver inflammation that result from viral hepatitis, but are not contagious.