What are the side effects of phenytoin?

There are many side effects of phenytoin. You may experience confusion, unmanageable eye movements, coordination loss, unusual body movements, and difficulty sleeping. You may also have sluggish thinking, dizziness, slurred speech, nausea, headaches, constipation, and vomiting. Lips may swell and become larger, and there may be undesired hair growth, roughening of facial features, a curving or pain in the penis, and an excess growth of your gums. Phenytoin may also cause you to have thoughts of suicide. Severe side effects may also include blisters, fever, swelling of your glands, joint pain, a rash, yellow skin, yellow eyes, pain on the upper right side of your stomach, extreme fatigue, abnormal bleeding or bruising, flu-like symptoms, and a loss of appetite. Talk to your doctor immediately if you experience any of these side effects.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.