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Maximum Strength Mucus DM

Generic name: dextromethorphan and guaifenesin [ DEX-troe-me-THOR-fan-and-gwye-FEN-e-sin ]

Brand names: Adult Cough DM, Children Giltuss Cough and Chest Congestion, Children’s Delsym Cough+Chest Congest DM, Children’s Robitussin Cough and Chest, Children’s Robitussin Cough and Chest Congestion DM,
Drug class: Combinations of upper respiratory tract

What is Maximum strength Mucus DM?

Dextromethorphan works as a Cough suppressant. Guaifenesin works as an expectorant.The combination medicine Maximum Strength Mucus DM treats cough and chest congestion due to the common flu, or allergies.The Dextromethorphan does not treat a cough caused by smoking.This leaflet does not list all the brands or forms of medication that are available.This medication guide does not list all possible uses for Maximum Strength Mucus DM.

Side effect of Maximum Strength Mucus DM 

If you experience any of the following symptoms of an allergic reaction, seek immediate medical attention: hives, difficulty breathing, swelling of your lips, face, throat, or tongue. The side effects of Maximum Strength Mucus DM can be serious. If you experience:

  •   Mood changes
  •   Headache or severe
  •   Feeling like you could pass out or dizziness;
  •  Some of the most common side effects associated with Maximum Strength Mucus DM include:
  •  Dizziness, drowsiness;
  •  Sleep problems (insomnia);
  •  Diarrhea; or
  •  Feeling nervous, restless or anxious

There may be other side effects. For medical advice on side effects, call your doctor. FDA can be contacted at 1-800-FDA-1088 to report side effects.


If you've taken an MAO-inhibitor in the last 14 days (such as isocarboxazid or linezolid), or if your symptoms are worsened by MAO inhibitors, do not take this medication.

Before you take this drug

If you have taken MAO inhibitors in the last 14 days, do not use Maximum strength Mucus DM. There is a risk of a dangerous -drug interaction. MAO inhibitors are isocarboxazid (linezolid), methylene-blue injection, phenelzine and selegiline.

If you suffer from:

  • A cough that produces mucus
  • asthma emphysema or chronic lung disease.
  • If you are pregnant or breastfeeding, consult your doctor before taking this medication.
  • This medicine could contain phenylalanine. If you have Phenylketonuria, check the label of your medication.

How to take Maximum Strength DM Mucus?

Follow the directions on the label or those prescribed by your physician. Cold and cough medicines are only to be used for a short time until symptoms have cleared up. Follow the directions on the label of any medicine you give to your child. Use the medicine to calm a child, not just to put him or her to sleep. The misuse of cough and cold medicine in very young children can lead to death. Measuring liquid medicine is important. Use the provided dosing device or a dose-measuring tool (not a spoon) to measure liquid medicine.

It may be necessary to shake the liquid prior to measuring a dose. Please follow all instructions on the label. Do not chew, crush or break the extended-release tablets. The granules can be sprinkled directly on your tongue. Swallow immediately. While taking this medication, drink extra fluids in order to loosen congestion and lubricate the throat. If your symptoms don't improve within 7 days or you experience a fever or rash or headaches, call your doctor. Tell the surgeon if you've taken the medicine in the last few days if you are going to need any kind of surgery. Store away from heat and moisture at room temperature.

What happens if I miss the dose?

You may not have a schedule for using Maximum Strength Mucus DM, as it is only used when necessary. If it is almost time to take your next dose, skip any missed dose. Never take two doses in one go.

What happens if I overdose?

Call 1-800-222-1222 for Poison Help or seek immediate medical attention.

What should be avoided?

You should avoid driving or other hazardous activities until you are sure of how Maximum Strength Mucus DM affects you. You may be unable to react properly. Alcohol consumption can have side effects when taken with this medication. Before using any other cold or cough medicines, ask your doctor or pharmacist if they contain similar ingredients.

Interaction with other drugs.

Use this medicine only if you are not taking any other medications that can cause drowsiness, slow breathing, or anxiety (such as an opioid, muscle relaxant, or medication for seizures).

Before using this medication, ask your doctor or pharmacist if you also use any other medications, such as vitamins and herbal remedies. When used together, some medicines can have unwanted or harmful effects.