Antiepileptic Drug Contraindications: Pregnancy, Organ Dysfunction, and Interactions

Selecting the right AED requires evaluating contraindications:

1. Pregnancy/fertility: Valproate teratogenic; women of childbearing potential should use effective contraception and avoid valproate if possible. Levetiracetam/lamotrigine may be safer—individual risk‑benefit assessment essential.
2. Liver dysfunction: Severe impairment amplifies hepatotoxicity of valproate, carbamazepine. Consider lower doses or alternatives with less hepatic metabolism.
3. Renal insufficiency: Renally cleared drugs (gabapentin, pregabalin, carbamazepine) accumulate → toxicity risk. Dose adjust or switch.
4. Hypersensitivity/allergy: Avoid specific AED/excipient to prevent serious reactions.
5. Cardiac conditions: Phenytoin, phenobarbital affect conduction; monitor closely or choose safer options.
6. Genetic/neurological disorders: Dravet syndrome, etc., may worsen with certain AEDs; genetics consult guides choice.
7. Drug‑drug interactions: Enzyme‑inducing AEDs (carbamazepine, phenytoin) reduce efficacy of contraceptives/anticoagulants. Full medication review mandatory.

Clinicians conduct thorough history, medication review, and health assessment before prescribing. Patients should discuss concerns with their provider before starting an AED.