The Web Health


Maxifed DMX

Generic name: dextromethorphan, guaifenesin, and pseudoephedrine [ dex-troe-meth-OR-fan, gwye-FEN-e-sin, soo-doe-e-FED-rin ]
Brand names: Capmist DM, Despec Drops, Maxifed DMX, Poly-Vent DM and Trispec PSE

Drug class: upper respiratory combinations

What is Maxifed DMX?

Dextromethorphan suppresses coughing. It interferes with the brain signals that cause the cough reflex. Guaifenesin acts as an expectorant. Guaifenesin helps to loosen up congestion in the chest and throat making it easier for you to cough.The decongestant pseudoephedrine shrinks the blood vessels of the nasal passages. Nasal congestion can be caused by dilated blood vessel.The combination medicine Maxifed DMX treats cough, stuffy nasal, sinus congestion, and chest congestion that are caused by allergies, a common cold or flu.Maxifed DMX can be used in other ways not mentioned in this guide.

Side effects of Maxified MDX

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.

This medication can cause serious side-effects. If you experience:

  • Fast or irregular heart rate
  • Feeling dizzy or anxious, as if you could pass out.
  • Severe headache
  • Mood changes
  • Fever
  • High blood pressure can cause dangerous symptoms (headache, blurred vision or buzzing in the ears, anxiety, chest discomfort, irregular heartbeats and seizures).

Maxifed DMX can cause a variety of side effects.

  •  Diarrhea;
  •  Dizziness, drowsiness;
  •  Sleep problems (insomnia); or
  •  Feeling nervous, restless or irritable.

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.


Maxifed DMX should not be used if you've taken an MAO-inhibitor in the last 14 days. Examples include isocarboxazid (linezolid), methylene blue injection (phenelzine), rasagiline (selegiline), or tranylcypromine.

Before you take this drug.

This medicine should not be used if you have an allergy to dextromethorphan or guaifenesin.If you have taken a MAO inhibitor within the last 14 days, do not take this medication. It is possible that a dangerous drug interaction will occur. MAO inhibitors are isocarboxazid (linezolid), phenelzine (phenelzine), rasagiline (selegiline), and tranylcypromine.

If you are suffering from:

  •  Elevated level of Blood pressure
  •  diabetes;
  •  glaucoma;
  •  Epilepsy or any other seizure disorder
  •  Urination or prostate problems.
  •  Developing tumors in adrenal glands
  •  Cough with mucus or cough due to emphysema, chronic bronchitis or bronchitis.

Maxifed DMX is not known to harm an unborn child. If you are pregnant, consult your doctor before taking this medication. This medicine can pass into breastmilk and harm a baby who is nursing. Decongestants can also reduce breast milk production. If you are breastfeeding a child, consult your doctor before taking this medication.

Phenylalanine can be found in cold medicines that are artificially sweetened. Check the label of your medication to determine if it contains phenylalanine if you suffer from phenylketonuria.

How to take Maxifed DMX?

Do not exceed the recommended dosage or duration. Use the recommended dose and do not exceed it. Cold and cough medicine is typically taken for only a few days until symptoms disappear. This medication should not be given to children younger than four years of age. Ask a doctor first before giving cough or cold medicines to children. The misuse of cough medicines and cold medicine in very young children can lead to death.

No longer chew or crush the extended-release tablets. Take it as a whole. Use the provided dosing syringe or a dose-measuring cup or spoon to measure liquid medicines. Ask your pharmacist if you don't have a device for measuring doses. While taking this medication, drink extra fluids in order to loosen congestion and lubricate the throat. Tell your doctor or surgeon if you've taken Maxifed DMX in the last few days if you plan to have surgery or medical testing. Take the medication for no more than seven days. Speak to your doctor if symptoms don't improve after seven days, or you experience a fever and headache with skin rash. Store away from moisture or heat at room temperature. Liquid medicines should not be allowed to freeze.

What happens if you miss a dose of the medication?

You may not have a regular dosing regimen because this medication is taken as needed. Take the missed dose immediately if you take the medication regularly. If your next scheduled dosage is near, skip the missed dose. You should not take more medicine to compensate for a missed dose.

What happens if I overdose?

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

What should be avoided?

Maxifed DMX can cause blurred vision, or affect your thinking and reactions. You should be careful when driving or doing anything else that requires alertness and the ability to see clearly. Certain side effects can be exacerbated by alcohol consumption. Before using any other allergy, cold or cough medicine, consult your doctor. Maxifed DMX is found in many combination medications. You can get too much medication by taking certain products in combination. You can check the label of a medication to see if it contains decongestants, expectorants, or cough suppressants.

Interaction with other drugs.

Before using this medication, ask your doctor or pharmacist if you also use any other medications, such as prescription and over the counter medicines, herbal products, vitamins and supplements. When used together, some medicines can have unwanted or harmful effects. This medication guide does not list all possible interactions.

This medicine can have adverse effects if taken with drugs that cause you to sleep or slow down your breathing. You should consult your doctor if you are taking this medication with sleeping pills, narcotic pain medicines, muscle relaxers, anxiety, depression or seizure medications.