All medications used for the treatment of any type of health condition can cause side effects.
Along with its intended results, acyclovir may cause a number of unwanted side effects. These effects can happen when you start a new medication, decrease or increase the dose of a medication, or when you stop using a medication.
Some side effects may be severe and require medical attention, while others may be mild and of little concern. It is essential that you let your doctor know if you are having side effects.