What is dextromethorphan?
Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.
Dextromethorphan is used to treat a cough. It is available over-the-counter alone and is also present in many over-the-counter and prescription combination medications.
Dextromethorphan will not treat a cough that is caused by smoking, asthma, or emphysema
Dextromethorphan side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using dextromethorphan and call your doctor at once if you have any of these serious side effects:
- severe dizziness, anxiety, restless feeling, or nervousness;
- seizures or convulsions;
- confusion, hallucinations; or
- slow, shallow breathing.
Less serious side effects are more likely, such as stomach upset.
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