What are the side effects of phenobarbital?

Stacy Wiegman, PharmD

Pharmacy

Side effects of phenobarbital include clumsiness, dizziness, drowsiness, confusion, nausea, headache, low blood pressure and slow heartbeat, slowed breathing, vomiting, and disorientation. Serious side effects include a severe allergic reactions (rash, hives, breathing trouble, chest tightness, swelling of mouth or face) and liver damage. Talk to your doctor about any side effects you experience. Call 911 for difficulty breathing, chest tightness, or swelling of the lips, mouth, tongue or throat.

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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.