Skip to Content

Doans PM Side Effects

Generic Name: diphenhydramine / magnesium salicylate

Note: This document contains side effect information about diphenhydramine / magnesium salicylate. Some of the dosage forms listed on this page may not apply to the brand name Doans PM.

Applies to diphenhydramine / magnesium salicylate: oral tablet

Get emergency medical help if you have any of these signs of an allergic reaction while taking diphenhydramine / magnesium salicylate: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

  • pale skin, feeling tired or short of breath, unusual weakness;

  • confusion, ringing in your ears;

  • pain when swallowing;

  • little or no urinating; or

  • symptoms of stomach bleeding--dizziness, fainting, black, bloody, or tarry stools, or coughing up blood or vomit that looks like coffee grounds.

Common side effects may include:

  • heartburn, nausea, vomiting, gas;

  • constipation;

  • diarrhea; or

  • dry mouth.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

More about Doans PM (diphenhydramine / magnesium salicylate)

Consumer resources

Related treatment guides

Hide