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MS Contin Side Effects

Serious MS Contin Side Effects

Some side effects with MS Contin, while occurring infrequently, are potentially serious and should be reported immediately to your healthcare provider. These include, but are not limited to:
  • Severe constipation
  • The urge to take more MS Contin than prescribed or for a non-medical purpose (see MS Contin Abuse)
  • Confusion
  • Falling or unsteadiness
  • Unusual changes in mood or behavior
  • A slow heart rate (bradycardia)
  • Difficulty passing urine
  • Low blood pressure (hypotension)
  • Slow or irregular breathing
  • Severe drowsiness
  • Seizures
  • Signs of an allergic reaction, such as:


    • An unexplained rash
    • Hives
    • Itching
    • Swelling of the mouth or throat
    • Wheezing
    • Difficulty breathing.


Many people develop itching due to morphine (the active ingredient in MS Contin), but are not allergic to the medication. Morphine causes a release of histamine, resulting in itching unrelated to an allergy. If you develop itching but no other allergy symptoms, it is unlikely that you are allergic to MS Contin. However, make sure to tell your healthcare provider, as there are medications available to help relieve the itching.

Less Common MS Contin Side Effects

There are other, less common MS Contin side effects that can occur. For these side effects, it is difficult to tell whether the side effect is caused by MS Contin or something else.
These less common MS Contin side effects include, but are not limited to:
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MS Contin Drug Information

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