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What are the side effects of dextromethorphan and promethazine?

Taking dextromethorphan and promethazine may cause a variety of side effects, ranging from mild to serious. Typical side effects include nausea, vomiting, lightheadedness, tiredness, blurred vision, ringing in the ears, and sensitivity to light.

More serious side effects include allergic reactions, anxiety, hallucinations, jaundice (yellow skin or eyes), shallow breathing, uncontrollable twitching, muscle stiffness, irregular heartbeat, weak pulse, and dark-colored urine. Get medical help immediately if you have any of these more serious 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.