Sep 25, 2002

A 90-day oral gavage toxicity study of D-methylphenidate and D,L-methylphenidate in Sprague-Dawley rats

Steve K TeoVikram D Khetani


D-methylphenidate is an enantiomer of D,L-methylphenidate and was developed as an improved treatment for attention deficit hyperactivity disorder in children. The current study was performed to determine and compare the toxicity of 2-50 mg/kg per day D-MPH and 100 mg/kg per day D,L-MPH for 90 days in rats with the top D-MPH dose being equimolar to 100 mg/kg D,L-MPH. The top D-MPH and D,L-MPH doses were at least 67 times that of the human dose and produced systemic exposures that were over 10 times higher than those typically achieved in children. During the course of the study, one male each from the 50 mg/kg per day and D,L-MPH groups and one female from the 50 mg/kg group died. Incidences of material around nose/eyes, scabbing, foot swelling, alopecia and abrasions were evident at 50 mg/kg per day D-MPH and 100 mg/kg per day D,L-MPH doses. Body weight and its changes decreased in a dose-dependent manner for D-MPH males. There were significant changes in some clinical chemistry measurements at the terminal bleed in the high dose groups of both sexes although most of these changes were resolved by the recovery bleed. Differences in absolute and relative body and certain organ weights for high dose D-MPH and D,L-MPH groups were ...Continue Reading

  • References13
  • Citations83


  • References13
  • Citations83

Mentioned in this Paper

Molecular Stereochemistry
Chemistry, Clinical
Edema of Foot (Finding)
Weighing Patient
Rats, Sprague-Dawley
No-Observed-Adverse-Effect Level

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