400 mg Each pink, flat, shield-shaped, pentagonal, bevelled-edged compressed tablet imprinted with "G" on one side and "ACY" over "400" on the other side, contains 400 mg of acyclovir. Nonmedicinal ingredients: iron oxide red, magnesium stearate, microcrystalline cellulose, povidone, and sodium starch glycolate. 800 mg. Zovirax Capsules, Suspension, and Tablets Drug Information / Drug Summary email print Close window. ... (i.e., long-term suppressive therapy) in patients with frequent or severe recurrences. Oral dosage. Adults. ... For patients receiving or 400 mg PO every 12 hours or 200 mg PO 5 times per day, reduce dose to 200 mg PO every 12 hours.. You should take Aciclovir 400 mg Tablets for seven days. Treatment of cold sores and genital herpes The usual dose is one 200 mg tablet taken five times a day You should space your dose by at least four hours Suggested times are: 7am, 11am, 3pm, 7pm and 11pm.