1 to about 500 mg of the active ingredient of the present invention flavored unit dosage forms contain from 1 to 100 mg for example 1 2 5 10 25 50 or 100 mg of the active ingredient the tablets or pills of the novel composition can be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action for example the tablet or pill can comprise an inner dosage and an outer dosage component the latter being in the form of an envelope over the former the two components can be separated by an enteric layer which serves to resist disintegration in the stomach and permits the inner component to pass intact into the duodenum or to be delayed in release a variety of materials can be used for such enteric layers or coatings such materials including a number of polymeric acids and mixtures of polymeric acids with such materials as shellac cetyl alcohol and cellulose acetate the liquid forms in which the novel compositions of the present invention may be incorporated for administration orally or by injection include aqueous solutions suitably flavored syrups aqueous or oil suspensions and flavored emulsions with edible oils such as cottonseed oil sesame oil coconut oil or peanut oil as well as elixirs and similar pharmaceutical vehicles suitable dispersing or suspending agents for aqueous suspensions include synthetic and natural gums such as tragacanth acacia alginate dextran sodium carboxymethylcellulose methylcellulose polyvinyl pyrrolidone or gelatin the pharmaceutical compositions of this invention can be administered by any of the methods known in the art in general the.