As the use of anticonvulsant increases in neurologic field, more studies are needed to reveal various harmful effects of this medication. Especially as for carbamazepine, thrombocytopenia may appear during administration of the medication, regardless of dosage. We, the authors, report that we diagnosed the patient as Bigiheo and Eumheohyeolheo, who was suffering from insomnia, diarrhea, papura, and serious thrombocytopenia. We presumed that the symptoms could be induced by carbamazepine, and used Samulgwibitanggamibang to treat her and obtained positive results.