Chickenpox is a disease caused by Varicella-Zoster, a virus that is easily spread from one person to another by touching the open sores, sneezing or coughing. It causes vesicles, aches, pains and fever. The same virus also causes herpes zoster (shingles) in adults. Below you may find medications used to treat or help with Varicella-Zoster. More about Varicella-Zoster