Ingestion times of phenytoin and antacid preparations containing calcium should be staggered in patients with low serum phenytoin levels to prevent absorption problems. What are the possible side effects of phenytoin? Get emergency medical help if you have any of these signs of an allergic reaction: difficulty swelling of your face, lips, tongue, or throat. Small percentage of individuals who have been treated with phenytoin have been shown to metabolize the drug slowly. Patients with impaired liver function, elderly patients, or those who online nakti kugosanai phenytoin are gravely ill may show early toxicity. Dilantin made an appearance in the 1962 novel One Flew Over the Cuckoo Nest by Ken Kesey, both as an anticonvulsant and as mechanism to control inmate behavior. Overdose of Generic for Phenytek Any medication taken in excess can have serious consequences. Unusually high levels result from liver disease, congenital enzyme deficiency, or drug interactions which result in metabolic interference.