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Maxiphen CDX Side Effects

Generic Name: codeine / guaifenesin / phenylephrine

Note: This document contains side effect information about codeine / guaifenesin / phenylephrine. Some of the dosage forms listed on this page may not apply to the brand name Maxiphen CDX.

Applies to codeine / guaifenesin / phenylephrine: oral tablet

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Get emergency medical help if a child taking this medicine has breathing problems, blue lips, or severe drowsiness, or if you cannot wake the child up from sleep.

Stop taking this medicine and call your doctor at once if you have:

  • noisy breathing, sighing, shallow breathing;

  • severe drowsiness, hallucinations;

  • fast, slow, or uneven heart rate;

  • a seizure;

  • nervousness, tremors; or

  • little or no urination.

Serious side effects may be more likely in older adults and those who are overweight, malnourished, or debilitated.

Common side effects may include:

  • dizziness, drowsiness, weakness;

  • headache;

  • nausea;

  • sleep problems (insomnia); or

  • feeling nervous, anxious, or restless.

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 Maxiphen CDX may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

More about Maxiphen CDX (codeine / guaifenesin / phenylephrine)

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Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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