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Polytussin DM Liquid

Generic name: dexbrompheniramine, dextromethorphan, and phenylephrine [dex-brom-feh-NEER-a-meen, dex-tro-meh-THOR-fan, and-feh-nill-EFF-rin]
Brand names: Alahist CF, Alahist DM (dexbrompheniramine), Brantussin DM, Panatuss Pediatric DXP, Polytussin DM Liquid
Classification of drugs: upper respiratory combinations

What is Polytussin DM Liquid?

Dexbrompheniramine is an antihistamine that decreases the effects of the natural chemical histamine within the body. Histamine may cause symptoms such as irritation, sneezing, itching, watery eyes, and a runny nose. Dextromethorphan is an effective cough suppressant. It alters the brain signals, which trigger the cough reflex.

Phenylephrine can be described as an anti-congestant that reduces the size of blood vessels that line the nasal passages. Blood vessels that are dilapidated can lead to nose congestion (stuffy nasal congestion). Polytussin Liquid can be described as a mix medicine that treats nasal stuffiness or runny noses as well as itching, sneezing, eye watering, coughing, and sinus congestion due to allergies, as well as the typical cold and influenza. Polytussin DM Liquid cannot help with a cough due to smoke, asthma, or emphysema. Polytussin DM Liquid could also be used to treat conditions that are not mentioned in this guideline.

Side Effects of Polytussin DM Liquid

See a doctor immediately. Get medical attention immediately if you notice symptoms or warning signs of an allergic response, such as hives, difficulty breathing, and swelling of your lips, face, tongue, throat, or face.

This medicine could trigger severe adverse consequences. Stop taking this medicine and consult your physician immediately if you suffer from:

  • Quick, pounding, and irregular heartbeats
  • Breath shortness;
  • Severe dizziness or nervousness;
  • Very little or no urine;
  • Difficulty sleeping trouble sleeping
  • Increased blood pressure, severe headache, blurred vision, and the pounding of your neck or ears anxious nasal bleeding.

Common negative side effects of the polytussin liquid could be:

  • Flushing (warmth, redness, or tingling sensation);
  • Dry mouth the nose, mouth, or throat;
  • Experiencing a sense of anxiety, restlessness, or anxiety;
  • Dizziness, drowsiness;
  • Being anxious or restless (especially when it comes to children);
  • Lack of appetite
  • Blurred vision or
  • Sleep problems (insomnia).

This isn't an exhaustive list of all the side effects. Other side effects could occur. Consult your physician for advice regarding medical effects. You can report any side effects to the FDA at 1-800-FDA-1088.

Dexbrompheniramine, dextromethorphan, and phenylephrine


Do not take Polytussin DM Liquid if you previously used an MAO inhibitor within the last 14 days, including linezolid and isocarboxazid, as well as phenelzine, methylene blue injection, rasagiline, selegiline, or tranylcypromine. Do not take cold or cough medicine to induce sleepiness in a child.

Prior to use this drug

It is not recommended to take this medication if you have an allergy to dextromethorphan, dexbrompheniramine, or the hormone phenylephrine.

Don't use your cough or cold medication if you've used an MAO inhibitor within the last 14 days. A potentially dangerous interaction between drugs may happen. MAO inhibitors comprise furazolidone isocarboxazid and rasagiline, linezolid, phenelzine selegiline, tranylcypromine, and

Ask your doctor or pharmacist to determine if this medication is safe to use if:

  • COPD, or asthma. COPD;
  • A cough that is mucusy or a cough that is caused by persistent bronchitis
  • A blockage in your stomach or in your intestines
  • Glaucoma;
  • Kidney or liver disease;
  • Diabetes;
  • The heart condition, high blood pressure;
  • A thyroid disorde
  • Urination issues.

Consult a physician before taking this medicine if you are breastfeeding or pregnant. The medicine in liquid form may contain phenylalanine. Be sure to read the medication label to determine if you suffer from phenylketonuria (PKU).

How to take Polytussin DM Liquid?

Make sure you follow the instructions on the label or as recommended by your physician. Medicines for a cold or cough are intended for use only until symptoms improve. Follow the instructions on the label of the medicine about the administration of cold or cough medicine to children. Do not take the medicine solely to help a child fall asleep. Death can occur through the misapplication of cough or cold medications to infants and young children. Take care when measuring liquid medicines. Make use of the dosing syringe supplied or a dosage-metering device (not the kitchen spoon).

Contact your physician if your symptoms don't improve after seven days or if you experience symptoms such as a temperature, rash, or headaches. If you require an operation or medical testing, inform the doctor or surgeon that you've had a cold or cold medication within the past couple of days. Storage at room temperature is free of heat and moisture. Avoid freezing.

What happens if I miss a dose?

Since polytussin liquid is only used for emergencies, it is possible that you are not following a regular dosing regimen. Don't miss any doses in the event that it's nearing the time to take your next dose. Don't take two doses at once.

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?

Drinking alcohol with Polytussin DM Liquid could produce side effects. Consult a physician or pharmacist prior to using any other cold or cough medicines that contain similar components. Avoid driving and other hazardous activities until you are aware of the effects this medicine has on your body. Your reaction could be affected.

Interaction with other drugs

Do not take this medication in conjunction with other drugs that may make you drowsy or slow the rate of breathing (such as opioids, a muscle relaxer, medication to treat anxiety, or seizures). Consult a physician or pharmacist before taking any other medication, which includes prescription or over-the-counter medications, vitamins, and herbal supplements. Some interactions with drugs are covered in this guide to medication.