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All medicines can cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most common side effects persist or become bothersome: Constipation; diarrhea; dizziness; drowsiness; dry mouth, throat, and nose; excitability; gas; headache; heartburn; nausea; stomach pain or upset; thickening of mucus in nose or throat.
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†Based on 7 hours of sleep which is the minimum recommended amount
††Among leading OTC nighttime pain relievers. Among those with a preference in a nationwide test.
*Among OTC pain relievers.
**Among OTC brands.
>Based on OTC sales.
‡‡Among OTC pain and sleep medications. Based on a survey of doctors.
^Among branded OTC nighttime pain relievers.