Acyclovir medication is an antiviral that is used to treat or prevent herpes simplex virus infections including genital herpes and cold sores. This drug can also be used for the treatment of other infections such as shingles and chickenpox which are caused by viruses from the same family. Acyclovir is a prescription drug that is… Continue reading Acyclovir Oral Tablet Dosage: Can You Take Acyclovir 400 mg Twice a Day?