Dextromethorphan / diphenhydramine / phenylephrine Side Effects
Applies to dextromethorphan / diphenhydramine / phenylephrine: oral liquid, oral suspension extended release
Get emergency medical help if you have any of these signs of an allergic reaction while taking dextromethorphan / diphenhydramine / phenylephrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
confusion, severe anxiety, hallucinations, tremors;
weak or shallow breathing;
a light-headed feeling, like you might pass out;
fast or pounding heartbeats;
painful or difficult urination, little or no urinating;
pale skin, weakness, easy bruising or bleeding, fever, chills, body aches; or
increased blood pressure--severe headache, buzzing in your ears, chest pain, shortness of breath, uneven heartbeats.
Common side effects may include:
dizziness, drowsiness, headache;
constipation, upset stomach, loss of appetite;
blurred vision, double vision, dry eyes;
sleep problems (insomnia); or
dry mouth, nose, or throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.
Some side effects of dextromethorphan / diphenhydramine / phenylephrine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
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- Drug class: upper respiratory combinations
Other brands: Dytan-DM
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