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Maxifed

Generic name: guaifenesin and pseudoephedrine

Brand names: Entex T, Maxifed, Mucinex D, Mucinex D Max Strength, Mucus Relief D, Poly-Vent IR, Sinutab Non Drying, Tusnel Pediatric Drops, Despec-SR, Respaire-30, Robitussin Severe Congestion, Triaminic Softchews Chest Congestion

Used for common cold
Last updated November 2, 2026 0 views
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What is Maxifed?

Maxifed is a combination medicine used by adults and children to relieve allergy symptoms like a runny or stuffy nose, sneezing, watery eyes, itching of the nose and throat, cough with mucus, sinus pain, and to reduce chest congestion caused by the common cold, hay fever, or other allergies.

There are many brand versions of guaifenesin and pseudoephedrine available, and not all brands are included in this leaflet.

Maxifed may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Maxifed?

Use exactly as directed on the label, or as prescribed by your doctor. Cold or cough medicine is only for short-term use.

Follow all directions when giving Maxifed to a child. Do not use the medicine to make a child sleepy. Misuse of this medicine may cause death in very young children.

Taking more than your recommended dose will not make this medicine more effective and may cause serious side effects.

Measure liquid medicine with the supplied measuring device (not a kitchen spoon).

Swallow the extended release tablet whole and do not crush, chew, or break it. Take with a full glass of water.

Your dose needs may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.

Stop using this medicine and call your doctor if your symptoms do not improve or get worse after 7 days, or if you also have a fever, rash, or headaches.

Store at room temperature away from moisture and heat.

This section was rewritten for readability and reviewed for meaning.

Warnings

Do not use Maxifed if you have taken an MAO inhibitor in the last 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

Taking more than your recommended dose will not make Maxifed work better and may lead to serious side effects.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Do not use Maxifed if you have taken an MAO inhibitor in the past 14 days. A serious drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

Tell your doctor if you have or have ever had:

  • heart disease;
  • high blood pressure;
  • diabetes;
  • a thyroid disorder;
  • urination problems due to an enlarged prostate; or
  • a cough with mucus or a chronic cough caused by smoking, asthma, chronic obstructive pulmonary disease (COPD), or another breathing problem.

Tell your doctor if you are pregnant or breastfeeding.

Do not give this medicine to a child without medical advice.

This section was rewritten for readability and reviewed for meaning.

Maxifed side effects

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

Maxifed may cause serious side effects. Stop using Maxifed and call your doctor right away if you have:

  • nervousness, dizziness, sleep problems (insomnia).

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

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Maxifed is used as needed. If you are following a dosing schedule, skip any missed dose. Do not use two doses at once.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Ask a doctor or pharmacist before taking other cough or cold medicines that may contain similar ingredients.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Maxifed?

Ask a doctor or pharmacist before using any other medicines that can cause drowsiness (such as opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Tell your doctor about all other medicines you use. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.