Cough Syrup DM Side Effects

Generic Name: dextromethorphan

Note: This page contains information about the side effects of dextromethorphan. Some of the dosage forms included on this document may not apply to the brand name Cough Syrup DM.

Not all side effects for Cough Syrup DM may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to dextromethorphan: oral capsule, oral capsule liquid filled, oral elixir, oral liquid, oral lozenge/troche, oral solution, oral suspension, oral suspension extended release, oral syrup, oral tablet

In addition to its needed effects, some unwanted effects may be caused by dextromethorphan (the active ingredient contained in Cough Syrup DM). In the event that any of these side effects do occur, they may require medical attention.

If any of the following side effects occur while taking dextromethorphan, check with your doctor or nurse as soon as possible:

Symptoms of overdose
  • Blurred vision
  • confusion
  • difficulty in urination
  • drowsiness or dizziness
  • nausea or vomiting (severe)
  • shakiness and unsteady walk
  • slowed breathing
  • unusual excitement, nervousness, restlessness, or irritability (severe)

Some of the side effects that can occur with dextromethorphan may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

Less common or rare
  • Confusion
  • constipation
  • dizziness (mild)
  • drowsiness (mild)
  • headache
  • nausea or vomiting
  • stomach pain

For Healthcare Professionals

Applies to dextromethorphan: compounding powder, oral capsule, oral disintegrating strip, oral drops, oral liquid, oral lozenge, oral solution, oral suspension extended release, oral syrup, oral tablet chewable

Nervous system

Nervous system side effects have included drowsiness and dizziness. Other side effects such as excitation, mental confusion, and opioid like respiratory depression have been rare and occurred at higher dosages. In some cases of abuse, patients experienced euphoria, hyperactivity, mania, and auditory and visual hallucinations.

Gastrointestinal

Gastrointestinal side effects have included stomach upset.

Hypersensitivity

Hypersensitivity side effects have included rare reports of fixed-drug eruptions.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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