Studies on lidocaine-induced kindling.
Lidocaine HCl, injected 5 times weekly, produces pharmacological kindling in rats. The aims of the present study were to: 1) approximate the threshold dose for the effect in mice and 2) determine if injections given less frequently than 5 times weekly produces kindling. Mice were injected (IP) either 5 times weekly for 4 weeks or 2 times weekly for 10 weeks, with doses ranging from 30 to 50 mg/kg. Kindling was defined as the appearance of convulsions on each of 5 consecutive injections. The estimated threshold dose for kindling was approximately 40 mg/kg, as suggested by the observation that 2 of 8 and 8 of 8 mice were kindled at 40 and 50 mg/kg respectively when injected 5 times each week. Whether mice were injected (50 mg/kg) 5 times weekly, or, only twice weekly, 80% of them were kindled by the fifteenth injection. Thus, it would appear that pharmacological kindling might be as much a function of number of injections as it is of frequency of injections.
Dorris
R L
RL
Department of Pharmacology, Baylor College of Dentistry, Dallas, Texas 75246.
Lotzof
L
L
D000818:Animals; D004305:Dose-Response Relationship, Drug; D007696:Kindling, Neurologic / Q000187:drug effects*; D008012:Lidocaine / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D051381:Rats
D008012:Lidocaine