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Phlemex Forte

Generic names: Dextromethorphan, guaifenesin, and phenylephrine [dex-troe-meth-OR-fan, gwye-FEN-e-sin, fen-il-EFF-rin].

Brand names: Broncotron Ped, Children Giltuss Cough and Cold, Deconex DMX, Desgen DM (Phenylephrine), Desgen Pediatric,… show all 39 brands
The class of drug: Upper respiratory combinations

What is Phlemex Forte?

Dextromethorphan is a cough suppressant that alters the neurons in the brain to stimulate the cough reflex. Guaifenesin can be described as an expectorant that eases congestion in the throat and chest. Phenylephrine can be described as a decongestant that shrinks blood vessels in nasal passages. Phlemex Forte is a mixed medicine to treat congestion, cough, and chest congestion that is caused by allergies, commonly-assisted colds, as well as an illness called the flu. Phlemex Forte will not treat coughs that are due to smoke, asthma, or emphysema. There are a variety of kinds and brands of this medication on the market. There are not all the brands mentioned in this leaflet. Phlemex Forte could also be used for other purposes not covered in this medication guide.

Side Effects of Phlemex Forte

Contact a medical professional immediately. Get medical attention immediately if you notice symptoms that indicate an allergic reaction, like hives, trouble breathing, or swelling of your lips, face, or tongue.

This medication could cause severe adverse effects. Stop taking this medicine immediately and call your physician if any adverse reactions develop, such as:

  • Minimal or no urination
  • Heartbeats that are slow or fast
  • Confusion, dizziness, feeling unsteady;
  • Nervousness; sleep problems (insomnia);
  • Severe nausea or vomiting;
  • Extreme headache blurred vision, pain in your neck or ear;
  • The breathing becomes slow and/or
  • Strange shifts in behavior or mood.

Common adverse and negative effects phlemex forte can include:

  • Diarrhea, constipation;
  • Dizziness, drowsiness;
  • Sleep problems (insomnia); or
  • Being anxious, restless, or even irritable.

This isn't a complete list of all the side effects. Other side effects could be present. Contact your doctor to seek medical advice on adverse effects. You can report adverse reactions to the FDA at 1-800-FDA-1088.


Don't take this medication in the event that you've taken an MAO inhibitor in the last 14 days, for example, isocarboxazid and linezolid, as well as phenelzin, rasagiline, selegiline, and tranylcypromine.

Prior to use this drug

This medication is used if you have an allergy to dextromethorphan, guaifenesin, or the hormone phenylephrine.

Don't take this medication in the event that you've had an MAO inhibitor within the last 14 days. A drug interaction that is dangerous can occur. MAO inhibitors include isocarboxazid linezolid, phenelzine and rasagiline, selegiline, tranylcypromine, and selegiline.

Ask your doctor or pharmacist for a recommendation on whether this medication is suitable for use if you are:

  • Heart disease, high blood pressure;
  • Diabetes;
  • A thyroid disorder
  • Urination issues;
  • Glaucoma;
  • Epilepsy or any other seizures;
  • Pheochromocytoma (an adrenal gland's tumor); or
  • Cough that is mucusy or cough due to the condition emphysema, as well as chronic bronchitis.

This medication may contain phenylalanine. Be sure to check the label of the medication if you suffer from phenylketonuria (PKU). Talk to your doctor prior to taking this medication if you are breastfeeding or pregnant.

How to take Phlemex Forte?

Take exactly as indicated on the label or as recommended by your physician. Cough or cough medication is intended for use only in the short term until the symptoms subside. Follow the instructions on the label of the medicine about the administration of cold or cough medicine to children. Do not take the medication solely to induce sleepiness in a child. Death can occur due to the use of cold or cough medicine in children who are very young. Don't crush, chew, or break the extended-release tablets. Suck it up whole.

Take care when measuring liquid medicines. Make use of the dosing syringe supplied or a dosage measuring device (not the kitchen spoon). Drink plenty of fluids to ease congestion and smooth your throat while taking this medicine.

Contact your physician if your symptoms don't improve after 7 days or if you experience symptoms such as a temperature, rash, or headaches. If you are in need of surgical intervention or tests for medical reasons, inform the doctor or surgeon prior to the time of your appointment if you have taken this medicine in the last few days. Storage at room temperature is far from heat and moisture. Don't allow the liquid medicine to become frozen.

What happens if I miss the dose?

Since cold or cough medication is prescribed when it's needed, it is possible that you are not following a regular dosing regimen. Do not miss any doses when it's time to get the next dose. Don't take two doses in one go.

What happens if I overdose?

Get medical attention in an emergency or contact the poison help line at 1-800-222-1222.

What should be avoided?

Avoid driving or engaging in hazardous activities until you are aware of the effects of this medication on your body. Your reaction could be affected.Drinking alcohol can trigger the effects of this medication. Talk to your doctor or pharmacist prior to using any other cough or cold medications that may have similar components.

Interaction with other drugs

Beware of using Phlemex Forte along with other medicines that can cause drowsiness or cause breathing to slow (such as opioids as well as a muscle relaxer or a medication used to manage anxiety and seizures). Consult a physician or pharmacist before taking any other medication, which includes prescription and over-the-counter medicines, vitamins, and herbal supplements. Some interactions with drugs are covered in this drug guide.