One and a half year old baby chickenpox condition is light does not need oral medication, the condition of the more serious people can eat antiviral drugs, in addition can also be for some other symptoms of the drug, such as antipyretic drugs, antihistamines and so on. 1. Antiviral drugs: chickenpox is caused by varicella zoster virus infection, you can take oral antiviral drugs to reduce the symptoms and shorten the course of the disease, such as acyclovir. 2. Antipyretic drugs: Chickenpox usually has fever for 1~2 days, and some patients have high fever, and they can take ibuprofen, acetaminophen and other drugs to reduce the fever after the body temperature exceeds 38.5℃. 3. Antihistamine drugs: chickenpox rash will be accompanied by itching, some patients itching is more obvious, this situation can be oral antihistamine drugs, such as cetirizine. One and a half year old baby chickenpox body condition is different, the degree of illness is different, the treatment is not the same, should be timely medical treatment as prescribed by the doctor.