Zovirax Capsules, Tablets, and Suspension are formulations for oral administration. Each capsule contains 200 mg of acyclovir and the inactive ingredients corn starch, lactose, magnesium stearate, and sodium lauryl sulfate. The capsule shell consists of gelatin, FD&C Blue No.2, and titanium dioxide. May contain one or more parabens. Printed with edible black ink.

Each 800 mg tablet of Zovirax contains 800 mg of acyclovir and the inactive ingredients FD&C Blue No.2, magnesium stearate, microcrystalline cellulose, povidone, and sodium starch glycolate.

Each 400 mg tablet of Zovirax contains 400 mg of acyclovir and the inactive ingredients magnesium stearate, microcrystalline cellulose, povidone, and sodium starch glycolate.

Each teaspoonful (5 ml) of Zovirax Suspension contains 200 mg of acyclovir and the inactive ingredients methylparaben 0.1% and propylparaben 0.02% (added as a preservative), carbomethylcellulose sodium, flavor, glycerin, microcrystalline cellulose, and sorbitol.