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What are the symptoms of an overdose on a painkiller?
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The main symptom of an overdose on a painkiller is feeling very drowsy, sleepy, or dizzy. Other symptoms can include confusion, slowed breathing and heart rate, nausea, vomiting, constipation, sweating, dizziness, weakness, headache, blurred vision, and seizures. In more serious cases, an overdose can lead to coma, respiratory depression, and death.