Acyclovir is an antiviral medication used to treat infections caused by the herpes virus, including genital herpes, cold sores, and shingles. The recommended dosage of acyclovir depends on the condition being treated and the patient's age and medical history.

According to Drug Patent Watch [1], the recommended dosage of acyclovir for adults with herpes simplex virus (HSV) infections is 200mg to 800mg orally every four hours, while awake, for five to ten days. For the treatment of shingles, the recommended dosage is 800mg orally every four hours, while awake, for seven to ten days.

Medscape [2] states that for the treatment of herpes simplex virus (HSV) infections, the recommended dosage of acyclovir for adults is 200mg orally every four hours, while awake, for ten days. For the treatment of shingles, the recommended dosage is 800mg orally every four hours, while awake, for seven to ten days.

Mayo Clinic [3] recommends the following dosages for acyclovir: for the treatment of initial genital herpes, the recommended dosage is 200mg orally every four hours, while awake, for ten days. For the treatment of recurrent genital herpes, the recommended dosage is 400mg orally three times a day for five days. For the treatment of shingles, the recommended dosage is 800mg orally every four hours, while awake, for seven to ten days.

It is important to note that these dosages are general guidelines, and a healthcare provider may adjust the dosage based on individual patient factors such as age, weight, and medical history. Patients should always follow their healthcare provider's instructions regarding the proper use and dosage of acyclovir.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ACYCLOVIR
[2] https://reference.medscape.com/drug/zovirax-acyclovir-342601
[3] https://www.mayoclinic.org/drugs-supplements/valacyclovir-oral-route/proper-use/drg-20066635