Parents and individuals on medications need to be aware of side effect profiles, and report any changes in health, behavior, or mood to their physicians.
Like all drugs, epilepsy medicines have side effects. Some are dose-related, and become more likely as the dose increases. Sedation, slurring of speech, and unsteadiness are common effects of antiepileptic drugs at high doses. The condition is usually referred to as toxicity. Similar effects may occur at standard doses at the beginning of treatment and then slowly resolve as the body becomes accustomed to them. Alternatively, if clearance of the drug is compromised by age, illness, or drug interaction, a normal dose may slowly build up to a level which produces these effects.