The Little Compound That Could: How Phenytoin Changed Drug Discovery and Development

Table 1

Anticonvulsant Activity of 5-alkoxymethyl and 5-phenoxymethyl-5-alkylhydantoins

Graphic
R R’ Activity*
Ethyl Iso-Amyla 0, 50b; 0, 0; 0, 135; 0, 315
Iso-Amyl Methyl 0, 40; 0, 90; +, 140; ++++, 250
Iso-Amyl n-Propyl 0, 20; 0, 40; 0, 65c; 0, 80; 0, 240c
Methyl Phenyl 0, 140; +++, 175d
Ethyl Phenyl +++, 140d
Iso-Propyl Phenyl 0, 87; 0, 80; 120f
n-Amyl Phenyl 0, 70; 0, 250; +, 400
Iso-Amyl Phenyle 0, 90; 0, 125; ++++, 280;+++, 400d
Phenyl Phenyl ++++, 120; ++++, 100g
  • * The anticonvulsive activity varying from 0 to ++++ is given for the dosage expressed in milligrams per kilogram of body weight of the animals.

  • a Henze (2) reported preliminary results which showed this compound to be unsatisfactory as a soporific.

  • b Reference (3).

  • c Convulsant. The cat given 65mg./kg. died in status a few minutes after treatment.

  • d Administered orally in capsules.

  • e Sodium salt given in aqueous solution.

  • f Fatal.

  • g Minimum effective anticonvulsant dose.

  • Table of compounds similar to phenytoin tested for anticonvulsant activity. Reprinted with permission (18).

This Article

  1. MI October 2009 vol. 9 no. 5 208-214