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Last reviewed on RxList: 9/18/2019
Entex-T Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 9/18/2019

Entex T (guaifenesin and pseudoephedrine hydrochloride) is a combination of an expectorant and nasal decongestant used to help loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive; temporarily relieve nasal congestion due to common cold, hay fever, and upper respiratory allergies (allergic rhinitis); temporarily restores freer breathing through the nose; promote nasal and/or sinus drainage; and temporarily relieve sinus congestion and pressure. Common side effects of Entex T include:

  • dizziness,
  • nervousness,
  • excitability,
  • trouble sleeping (insomnia),
  • nausea, and
  • headache

The dose of Entex T for adults and children over 12 years of age is 1 tablet every 4 hours. The dose of Entex T for children 6 to under 12 years of age is ½ tablet every 4 hours. Entex T may interact with monoamine oxidase inhibitors (MAOIs), other decongestants tricyclic antidepressants, and some blood pressure medications. Tell your doctor all medications and supplements you use. Tell your doctor if you are pregnant or plan to become pregnant before using Entex T. The pseudoephedrine in Entex T passes into breast milk and may have undesirable effects on a nursing infant. It is unknown if guaifenesin passes into breast milk. Consult your doctor before breastfeeding.

Our Entex T (guaifenesin and pseudoephedrine hydrochloride) Tablet Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


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Entex-T Professional Information


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Read the entire FDA prescribing information for Entex-T (Guaifenesin and Pseudoephedrine Hydrochloride Tablets)


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© Entex-T Patient Information is supplied by Cerner Multum, Inc. and Entex-T Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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