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Phenytoin

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Missed Dose

If you miss a dose, take it as soon as you remember. If it is within 4 hours of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up. Check with your doctor if you miss doses for more than 2 days in a row.

Overdose

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669. Symptoms of overdose may include: severe mental/mood changes, severe drowsiness, loss of consciousness, slowed breathing.