The effect of the amount of emulsified corn oil ingested on the gastrointestinal absorption of griseofulvin in man was assessed after oral administration of 5, 10, 15 or 30 g doses of a corn oil (40% wt/wt)-in-water emulsion dosage form, each containing 250 mg of microsize griseofulvin. For comparison, griseofulvin absorption from two 125 mg commercial tablets of ultramicrosize drug dispersed in polyethylene glycol 6000 was also determined. Griseofulvin was almost completely absorbed from the microsize drug emulsions and ultramicrosize drug tablets, 50% of an oral dose is absorbed from commercial microsize griseofulvin tablets. Only 4 g of emulsified corn oil (as a 10-g dose of emulsion) is required to maximize the uniformity and extent of griseofulvin absorption. The emulsion dosage form is uniquely suited for pediatric use.