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Dimaphen DM Childrens

Generic name: brompheniramine, dextromethorphan, and phenylephrine

Brand names: Children's Cold and Cough DM, Cold and Cough Childrens, Dimaphen DM Childrens, Dimetapp Cold and Cough Childrens, EndaCof-DM, Presgen B, Rynex DM, Tussi-Pres B

Used for nasal congestion
Last updated November 2, 2026 0 views
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What is Dimaphen DM Childrens?

Brompheniramine is an antihistamine that helps reduce the effects of histamine, a natural chemical in the body. Histamine can cause symptoms like sneezing, itching, watery eyes, and a runny nose.

Dextromethorphan is a cough suppressant. It works on the brain signals that trigger the cough reflex.

Phenylephrine is a decongestant that narrows blood vessels in the nasal passages. When blood vessels are swollen, they can lead to nasal congestion (stuffy nose).

Dimaphen DM Childrens is a combination medicine used to treat cough, runny or stuffy nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.

Dimaphen DM Childrens will not treat a cough that is caused by smoking, asthma, or emphysema.

Dimaphen DM Childrens may also be used for other reasons not mentioned in this medication guide.

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How should I take Dimaphen DM Childrens?

Use exactly as directed on the label, or as prescribed by your doctor. Do not use larger or smaller amounts or for longer than recommended. Cough or cold medicine is usually taken only for a short time until your symptoms go away.

Do not give this medication to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children.

Measure liquid medicine with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.

Do not take for longer than 7 days in a row. Talk with your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache or skin rash.

If you need surgery or medical tests, tell the surgeon or doctor in advance if you have taken this medicine within the past few days.

Store at room temperature away from moisture and heat.

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Warnings

Do not use this medicine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur.

MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Do not use Dimaphen DM Childrens if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

To ensure this medicine is safe for you, tell your doctor if you have:

  • asthma or COPD, cough with mucus, or cough caused by smoking, emphysema, or chronic bronchitis;
  • a blockage in your digestive tract (stomach or intestines);
  • high blood pressure or heart disease;
  • liver or kidney disease;
  • glaucoma;
  • cough with mucus, or cough caused by emphysema or chronic bronchitis;
  • enlarged prostate or urination problems;
  • pheochromocytoma (an adrenal gland tumor);
  • overactive thyroid; or
  • if you take potassium (Cytra, Epiklor, K-Lyte, K-Phos, Kaon, Klor-Con, Polycitra, Urocit-K).

FDA pregnancy category C. It is not known if Dimaphen DM Childrens will harm an unborn baby. Do not use this medicine without a doctor's advice if you are pregnant.

This medicine can pass into breast milk and may harm a nursing baby. Antihistamines and decongestants may also slow breast milk production. Do not use this medicine without a doctor's advice if you are breast-feeding a baby.

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Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

This medicine may cause serious side effects. Stop using this medicine and call your doctor right away if you have:

  • confusion, severe anxiety, hallucinations, tremors;
  • weak or shallow breathing;
  • feeling faint, like you might pass out;
  • fast or pounding heartbeats;
  • painful or difficult urination, little or no urinating;
  • pale skin, weakness, easy bruising or bleeding, fever, chills, body aches; or
  • increased blood pressure—severe headache, buzzing in your ears, chest pain, shortness of breath, uneven heartbeats.

Common side effects of Dimaphen DM Childrens may include:

  • dizziness, drowsiness, headache;
  • constipation, upset stomach, loss of appetite;
  • blurred vision, double vision, dry eyes;
  • sleep problems (insomnia); or
  • dry mouth, nose, or throat.

This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Since Dimaphen DM Childrens is taken as needed, you might not have a set dosing schedule. If you are taking the medicine regularly and miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose. Do not take extra medicine to compensate for the missed dose.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical help or call the Poison Help line at 1-800-222-1222.

Drinking alcohol can worsen some side effects of Dimaphen DM Childrens.

Before using any other cold, cough, allergy, or sleep medicine, ask a doctor or pharmacist. Many combination medicines contain antihistamines and cough suppressants. Taking certain products together can lead to getting too much of a specific drug. Check the label to see if a medicine has an antihistamine or cough suppressant.

This medication may cause blurred vision and may affect your thinking or reactions. Be cautious if you drive or do anything that requires you to be alert and see clearly.

Avoid getting too hot or dehydrated while exercising and in hot weather. Brompheniramine and phenylephrine can reduce sweating, making you more likely to have heat stroke.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect brompheniramine, dextromethorphan, and phenylephrine?

Tell your doctor about all medicines you use, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.

Taking Dimaphen DM Childrens with other drugs that make you sleepy or slow your breathing can make these effects worse. Ask your doctor before taking Dimaphen DM Childrens with a sleeping pill, narcotic pain medicine, muscle relaxer, or medicine for anxiety, depression, or seizures.

This section was rewritten for readability and reviewed for meaning.

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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.