Does carnitine administration improve the symptoms attributed to anticonvulsant medications?: a double-blinded, crossover study.
OBJECTIVE
This study was designed to assess the reported improvement in "well-being" perceived by parents when children who are taking anticonvulsant medications are administered carnitine.


METHODS
Forty-seven children with seizures who were taking either valproic acid or carbamazepine were enrolled in a placebo-controlled, double-blinded, cross-over study of the effects of oral carnitine administration (100 mg/kilo) on their well-being as perceived by their parents. The well-being scores were assessed weekly by phone and in person at the start and end of each 4-week phase.


RESULTS
The children's well-being scores improved weekly when either placebo or carnitine were administered. None of the analyses of improved well-being achieved statistical significance.


CONCLUSIONS
We believe this study documents the necessity for controlled trials when assessing the subjective, beneficial effects of medications. Carnitine is expensive, costing approximately $.30/kilogram of body weight per day ($6 per day for a 20 kilo child). It would not appear warranted to administer carnitine prophylactically to children on anticonvulsant medications for alleviating common, nonspecific symptoms. Because there are no reliable clinical or laboratory tests of symptomatic carnitine deficiency caused by anticonvulsant administration, how to identify children in need of carnitine, and when to administer carnitine therapeutically to children receiving valproate or other anticonvulsants is unclear.
Freeman
J M
JM
Department of Neurology, Johns Hopkins Medical Institutions, Baltimore, MD.
Vining
E P
EP
Cost
S
S
Singhi
P
P
D002220:Carbamazepine / Q000009:adverse effects* / Q000627:therapeutic use; D002331:Carnitine / Q000172:deficiency / Q000627:therapeutic use*; D002648:Child; D004311:Double-Blind Method; D004827:Epilepsy / Q000188:drug therapy* / Q000523:psychology; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D010865:Pilot Projects; D014635:Valproic Acid / Q000009:adverse effects* / Q000627:therapeutic use
D002220:Carbamazepine; D014635:Valproic Acid; D002331:Carnitine