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Deconsal DM

Deconsal Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 3/16/2016

Deconsal DM (phenylephrine, pyrilamine maleate, and dextromethorphan hbr) Tannate Chewable Tablets are an antihistamine/nasal decongestant/antitussive combination used for the symptomatic relief of head cold with a runny nose (coryza), nasal congestion, and cough associated with the common cold, sinusitis, allergic rhinitis, and other upper respiratory tract conditions. Deconsal DM is available in generic form. Common side effects of Deconsal DM include:

  • drowsiness
  • sedation
  • dizziness
  • headache
  • blurred vision
  • dry nose/mouth/throat
  • upset stomach
  • nausea and constipation
    • The dose of Deconsal DM for children 12 years and older and adults is 1 to 2 tablets, every 12 hours; 6 to 12 years of age - 1/4 to 1 tablet, every 12 hours. Deconsal DM may interact with MAO inhibitors. Tell your doctor all medications and supplements you use. During pregnancy, Deconsal DM should be used only if prescribed. Because of the higher risk of intolerance of antihistamines in small infants generally, and in newborns and prematures in particular, Deconsal DM should not be used while breastfeeding.

      Our Deconsal DM (phenylephrine, pyrilamine maleate, and dextromethorphan hbr) Tannate Chewable Tablets Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

      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.

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Deconsal FDA Prescribing Information: Side Effects
(Adverse Reactions)


The most common effects associated with antihistamines have been drowsiness sedation, dryness of mucous membranes, and gastrointestinal effects. Serious side effects with oral antihistamines, sympathomimetics, and antitussives have been rare. Other adverse reactions may include:

Dermatologic - urticaria, drug rash, photosensitivity, pruritus.

Cardiovascular - hypotension, hypertension, cardiac arrhythmias, palpitations.

Central Nervous Systems (CNS) - disturbed coordination, tremor, irritability, insomnia, visual disturbances, weakness, nervousness, convulsion, headache, euphoria, and dysphoria.

Genitourinary - urinary frequency, difficult urination.

Gastrointestinal - epigastric discomfort, anorexia, nausea, vomiting, diarrhea, constipation. Respiratory - tightness of the chest and wheezing, shortness of breath. Hematologic - hemolytic anemia, thrombocytopenia, agranulocytosis.

Read the entire FDA prescribing information for Deconsal (Phenylephrine, Pyrilamine Maleate, and Dextromethorphan HBr)

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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