A liquid composition for oral administration comprising a pharmaceutically
active medicament coated with a taste masking effective amount of a
polymer blend of (a) dimethylaminoethyl methacrylate and neutral
methacrylic acid ester (MM/MAE) and (b) a cellulose ester, in an aqueous
vehicle, wherein the polymer weight ratio of the cellulose ester to the
MM/MAE is about 40:60 to about 90:10, preferably about 60:40. The liquid
composition utilizes a "reverse enteric coating" which is soluble in the
acid pH's of the stomach, generally about 1.0 to 4.0, but relatively
insoluble at the non-acidic pH's of the mouth. The coatings provide for
rapid release and absorption of the drug, which is generally desirable in
the case of liquid dosage forms.