The following information is a summary about ACYCLOVIR . It is not intended to replace a doctor's instructions.

Tablets
Chemical Name: ACYCLOVIR (ay-SYE-kloe-veer)

Common uses
This medicine is an antiviral used to treat shingles, chickenpox, or genital herpes. It may also be used to treat other conditions as determined by your doctor.

Before using
INFORM YOUR DOCTOR OR PHARMACIST of all prescription and over-the-counter medicine that you are taking. Inform your doctor of any other medical conditions, allergies, pregnancy, or breast-feeding.

Directions
Follow the directions for using this medicine provided by your doctor. TAKE THIS MEDICINE with food or milk if it upsets your stomach. STORE THIS MEDICINE at room temperature, away from light and moisture. TO CLEAR UP YOUR INFECTION COMPLETELY, continue taking this medicine for the full course of treatment even if you feel better in a few days. Do not miss any doses. IF YOU MISS A DOSE OF THIS MEDICINE, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Cautions
IF YOUR SYMPTOMS DO NOT IMPROVE WITHIN A FEW DAYS or if they become worse, check with your doctor. IF YOU ARE USING THIS MEDICINE FOR GENITAL HERPES, begin using it as soon as you notice symptoms (pain, burning, blisters) of an infection. Use a condom during sexual intercourse. IF YOU PLAN ON BECOMING PREGNANT, discuss with your doctor the benefits and risks of using this medicine during pregnancy. If you are or may be pregnant, check with your doctor for instructions on using this medicine during pregnancy. BEFORE YOU BEGIN TAKING ANY NEW MEDICINE, either prescription or over-the-counter, check with your doctor or pharmacist. THIS MEDICINE IS EXCRETED IN BREAST MILK. IF YOU ARE OR WILL BE BREAST-FEEDING while you are using this medicine, check with your doctor or pharmacist to discuss the risks to your baby.

Possible side effects
SIDE EFFECTS, that may go away during treatment, include nausea, vomiting, diarrhea, or headache. If they continue or are bothersome, check with your doctor. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist.

Drug interactions
Drug interactions can result in unwanted side effects or prevent a medicine from doing its job. Use our drug interaction checker to find out if your medicines interact with each other. 

If you take too much
If overdose is suspected, contact your local poison control center or emergency room immediately.

Additional information
DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. KEEP THIS MEDICINE out of the reach of children. IF USING THIS MEDICINE FOR AN EXTENDED PERIOD OF TIME, obtain refills before your supply runs out.