Guaifenesin and Dextromethorphan Side Effects
What should I watch for?
Do not treat yourself for a cough for more than 1 week without consulting your doctor or health care professional. If you have a high fever, skin rash, lasting headache, or sore throat, see your doctor.
Drink 6 to 8 glasses of water daily while you are taking this medicine to help loosen mucus.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
Side Effects to watch for
Side effects that you should report to your doctor or health care professional as soon as possible:
- allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
- breathing problems
- excitement, nervousness, restlessness, or irritability
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
- stomach upset
What may interact with this drug?
Do not take this medicine with any of the following medications:
This medicine may also interact with the following medications:
- other medicines for colds or allergy
- medicines for depression or other mental disturbances