Final answer:
Side effects of phenytoin include constipation, bleeding gums, and decreased white blood cell count.
Step-by-step explanation:
Phenytoin is a medication used to treat seizures. Side effects of phenytoin can include constipation, bleeding gums, and decreased white blood cell count. Constipation is a common side effect of phenytoin and can be managed with dietary changes and medications. Bleeding gums may occur due to the medication's effect on blood clotting. Decreased white blood cell count can make a person more prone to infections. These side effects should be reported to a healthcare provider for further evaluation and management.