Phenytoin and phenytoin derivatives for local administration

: A well known side effect of the long-term therapy with phenytoin is gum hyperplasia. 1-Acyl compounds and esters of the p-hydroxymetabolite with aliphatic and aromatic carboxylic acids were synthesized as potential prodrugs for therapeutic use if the neoformation of connective tissue is intended. The compounds were characterized by there physico-chemical constants and the absorption was proofed by a buccal test.