Acyclovir is used for people diagnosed with roof shingles (herpes zoster), genital herpes and chickenpox. Its impacts are based upon stopping the spread of the herpes pc virus, meanings it does not treat the condition and does not protect against other individuals from getting the infection. Pay attention to the directions of your medical professional quite meticulously as the period of treatment and application schedule might be various for different people. In truth you might be called for to take acyclovir for approximately a year. Being sensitive to acyclovir and valacyclovir is a direct contraindication for taking this medicine.