RT Journal A1 Livingston S, Livingston HL T1 DIphenylhydantoin gingival hyperplasia JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1969 FD March 1 VO 117 IS 3 SP 265 OP 270 DO 10.1001/archpedi.1969.02100030267002 UL http://dx.doi.org/10.1001/archpedi.1969.02100030267002 AB DIPHENYLHYDANTOIN (Dilantin) sodium was synthesized in 1908 by Biltz1 and introduced as an antiepileptic agent in 1938 by Merritt and Putnam.2 Extensive subsequent use of this drug has confirmed its efficacy in controlling epileptic seizures, particularly major motor (grand mal) convulsions.A number of untoward reactions have been observed in patients receiving diphenylhydantoin,3 one of the most common being hyperplastic enlargement of the gingivae.The prime purpose of this writing is to discuss this reaction in general and, more importantly, to designate the types of patients with epilepsy in whom, because of this reaction, we believe the use of diphenylhydantoin as the drug of first choice is contraindicated.The information presented in this paper is based on direct clinical observations of approximately 15,000 patients of all ages who were studied in our clinic while receiving this drug and, also, on an extensive review of the literature.Incidence