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What are the side effects of morphine sustained release?

Morphine sustained release may cause a serious allergic reaction with symptoms such as hives, breathing difficulty and swelling of the face, throat, lips or tongue. Get emergency medical help if you experience any of these signs. Contact your doctor immediately if you have any of the following serious side effects from this narcotic pain reliever, such as:

  • shallow breathing
  • a slow heartbeat
  • convulsions (seizures)
  • skin that becomes cold and clammy
  • confusion
  • feeling lightheaded
  • dizziness
  • fainting
  • severe weakness

Less serious and more common side effects of morphine sustained release include:

  • constipation, nausea, lost appetite, diarrhea, vomiting or stomach pain
  • headaches, memory difficulty, anxiety or dizziness
  • sleeping difficulty (insomnia)

Morphine sustained release can be habit-forming. It can cause drowsiness and you should not drive or operate dangerous machinery. There may be other side effects that have not been reported. Talk to your doctor about any side effects you experience while taking morphine sustained release.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.