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Maxi-Tuss PE Jr

Generic name: guaifenesin and phenylephrine

Brand names: Deconex IR, Despec, ED Bron GP, Gilphex TR, Giltuss Sinus and Congestion, Maxi-Tuss PE Jr, Mucinex Children's Stuffy Nose and Chest Congestion, Mucus Relief Sinus, Rescon-GG, Supress-PE, Aldex G, Aquatab D, D-Phen 1000, Deconex, Donatussin Drops, Duravent PE, Liquibid-PD, MucaphEd, Nariz, Prolex D

Used for common cold
Last updated November 2, 2026 0 views
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What is Maxi-Tuss PE Jr?

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

There are many brands and forms of guaifenesin and phenylephrine available, and not all brands are included in this leaflet.

Maxi-Tuss PE Jr 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 Maxi-Tuss PE Jr?

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 Maxi-Tuss PE Jr to a child. Do not use the medicine to make a child sleepy. Misuse of this medicine may cause death in very young children.

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

Take the tablet with a full glass of water.

Your dose 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.

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

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 Maxi-Tuss PE Jr if you have taken an MAO inhibitor in the past 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 increase the effectiveness of Maxi-Tuss PE Jr and may lead to serious side effects.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Do not use Maxi-Tuss PE Jr if you have taken an MAO inhibitor in the last 14 days. This could lead to a serious drug interaction. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine. Wait at least 14 days after stopping an MAO inhibitor before taking this medicine.

Tell your doctor if you have or have ever had:

  • high blood pressure;
  • heart disease;
  • 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 disorder.

Ask your doctor before using this medicine 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.

Maxi-Tuss PE Jr 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.

Maxi-Tuss PE Jr may cause serious side effects. Stop using Maxi-Tuss PE Jr 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?

Maxi-Tuss PE Jr is used as needed. If you miss a dose while on a dosing schedule, skip that dose. Do not take two doses at the same time.

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 have similar ingredients.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Maxi-Tuss PE Jr?

Ask a doctor or pharmacist before using any other medicines that can make you sleepy (like opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Inform your doctor about all other medicines you are taking. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are mentioned 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.