Lamotrigine Disease Interactions

There are 2 disease interactions with lamotrigine:

Severe, potentially fatal reactions such as Stevens-Johnson syndrome and toxic epidermal necrolysis have been associated with the use of lamotrigine. The incidence has been reported at approximately 1 in 1000 for adults and up to 1 in 50 for pediatric patients treated with the drug. Life-threatening rashes have usually, but not always, occurred within 2 to 8 weeks of initiating treatment. Therapy with lamotrigine should be administered cautiously in patients with preexisting drug-induced dermatitis, since it may delay the recognition of a potential reaction to lamotrigine. Lamotrigine therapy should be withdrawn promptly at the first sign of a rash. However, discontinuation of treatment may not prevent a rash from becoming life-threatening or permanently disabling or disfiguring. There have been suggestions that the risk of rash may be increased by 1) coadministration with valproic acid, 2) exceeding the recommended initial dosage, or 3) exceeding the recommended rate of dosage escalation of lamotrigine.

Lamotrigine is primarily converted by the liver to inactive glucuronide metabolites and subsequently eliminated by the kidney. Approximately 10% of a dose is excreted in the urine as unchanged drug. The plasma clearance of lamotrigine may be decreased and the half-life prolonged in patients with impaired renal and/or hepatic function. However, clinical data are limited. In a comparison of 12 healthy subjects and 24 with various degrees of liver disease, lamotrigine pharmacokinetics were significantly altered only in patients with severe cirrhosis. Therapy with lamotrigine should be administered cautiously and at reduced dosages in such patients.

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lamotrigine drug Interactions

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lamotrigine food/lifestyle Interactions

There is 1 food/lifestyle interaction with lamotrigine

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