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Resperal-DM Drops

Generic name: brompheniramine, dextromethorphan, and pseudoephedrine

Brand names: Allanhist PDX Drops, Anaplex DM, Andehist DM NR Syrup, Bromaline DM, Bromhist PDX, Bromplex DM, Resperal-DM Drops

Used for common cold
Last updated November 3, 2026 0 views
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What is Resperal-DM Drops?

Brompheniramine is an antihistamine. Dextromethorphan is a cough suppressant. Pseudoephedrine is a decongestant.

Resperal-DM Drops is a combination medicine used to treat cough, runny or stuffy nose, sneezing, and watery eyes caused by allergies or the common cold.

Resperal-DM Drops may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Resperal-DM Drops?

Follow all instructions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Follow all directions when giving this medicine to a child. Do not use the medicine to make a child sleepy. Misuse of this medicine may cause death in very young children.

Measure liquid medicine with the provided measuring device (not a kitchen spoon).

Call your doctor if your symptoms do not improve after 7 days, or if you have a fever, rash, or headaches.

If you need surgery or medical tests, inform the doctor ahead of time if you have taken this medicine within the past few days.

Store tightly closed at room temperature, away from moisture and heat.

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Warnings

Use only as directed. Inform your doctor if you are taking other medicines or have any medical conditions or allergies.

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Before taking this medicine

You should not use this medicine if you are allergic to brompheniramine, dextromethorphan, or pseudoephedrine, or if you have:

  • severe high blood pressure; or
  • severe coronary artery disease (clogged arteries).

Do not use Resperal-DM Drops if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

Tell your doctor if you have ever had:

  • asthma or COPD (chronic obstructive pulmonary disease);
  • a cough with mucus, or a cough caused by smoking, asthma, or emphysema;
  • a blockage in your digestive tract (stomach or intestines);
  • a bladder obstruction or other urination problems;
  • high blood pressure, heart disease;
  • glaucoma;
  • diabetes; or
  • overactive thyroid.

Tell your doctor if you are pregnant.

Do not breastfeed.

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Resperal-DM Drops side effects

Get emergency medical help if you have signs of an allergic reaction: hives; trouble 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:

  • hallucinations;
  • a seizure;
  • painful or difficult urination;
  • feeling light-headed, like you might pass out;
  • fast or pounding heartbeats;
  • pale skin, weakness, easy bruising or bleeding, fever, chills, body aches; or
  • severe headache, blurred vision, pounding in your neck or ears.

Common side effects of Resperal-DM Drops may include:

  • dizziness, drowsiness;
  • coughing up thick mucus;
  • feeling restless or excited (especially in children); 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 FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Resperal-DM Drops can be used as needed. If you miss a dose while on a dosing schedule, skip that dose. Never take two doses at the same time.

Do not take more than 6 doses in a 24-hour period.

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What happens if I overdose?

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

Overdose symptoms may include feeling depressed or restless, fast or irregular heartbeats, severe drowsiness, loss of coordination, or seizure.

Ask a doctor or pharmacist before taking other cough or cold medicines that may contain similar ingredients.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.

Avoid becoming overheated or dehydrated during exercise and in hot weather. This medicine can decrease sweating and you may be more prone to heat stroke.

Drinking alcohol with this medicine can cause side effects.

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What other drugs will affect Resperal-DM Drops?

Ask a doctor or pharmacist before using any other medicines that can cause drowsiness (such as opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Inform your doctor about all other medicines you are using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are included here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

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.