When should I call my doctor if I am taking Kadian?

If you are taking the extended-release pain medication Kadian (morphine), you should call your doctor if you experience certain side effects that could be serious or fatal. In particular, you or someone who is with you should seek emergency medical attention if you have any symptoms of an overdose of this pain medication. Symptoms of overdose include:
  • slow, shallow or irregular breathing
  • extreme drowsiness
  • coma
  • loose, floppy muscles
  • cold, clammy skin
  • constricted pupils
  • fainting/unconsciousness
  • slow heartbeat

You should also call your doctor right away if you have any of the following symptoms:

  • hives, rash or itching
  • difficulty breathing
  • swelling of your face, mouth, throat, tongue, lower legs, hands or arms
  • fast or slow heartbeat
  • hallucinations (seeing or hearing things that aren’t there)
  • seizures
  • fainting
  • blue or purple skin color
  • vision problems

In addition, you should call your doctor if any of these side effects are severe or don't go away:

  • dizziness, light-headedness, drowsiness or weakness
  • nausea, diarrhea, vomiting or constipation
  • loss of appetite, weight loss or not being able to taste food
  • dry mouth, sweating
  • agitation, nervousness, mood changes or confusion
  • difficulty falling asleep or staying asleep
  • uncontrollable shaking of a part of the body, muscle stiffness
  • trouble urinating

You should call your doctor right away if you become pregnant while taking Kadian.

If you want or need to take a new medicine or supplement while you're using Kadian, talk with your doctor first. Certain medications and supplements may interact with Kadian and cause serious side effects.

You should also call your doctor if you want to stop taking Kadian. Stopping this drug suddenly may cause withdrawal symptoms.

Call your doctor if your dose of Kadian is not helping relieve your pain. Your doctor may need to adjust your dose of Kadian or your other pain medicine.

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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.