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Side Effects of Morphine Sulfate ER

Common Side Effects of Morphine Sulfate ER

Morphine sulfate ER has been studied thoroughly in many different clinical trials. In these studies, the most common side effects of morphine sulfate ER products included:
Interestingly, these common morphine side effects usually occur less frequently and less severely in people with severe pain. People who have little or no pain are more likely to experience severe morphine sulfate ER side effects.
For most people, drowsiness and nausea significantly improve after taking morphine sulfate ER for a week or so. If nausea is severe, your healthcare provider may recommend an anti-nausea medication for a few days, until your body becomes accustomed to morphine sulfate ER.

Less Common Side Effects

There are other, less common morphine sulfate ER side effects that can occur. For these side effects, it is difficult to tell whether the side effect is caused by morphine sulfate ER or something else.
These less common side effects include, but are not limited to:
  • A spinning sensation (vertigo)
  • Abnormal dreams
  • Absent menstrual periods
  • Accidental injury
  • Anemia
  • Back pain
  • Blurred vision or double vision.
  • Changes in taste
  • Chills
  • Diarrhea and cramps
  • Difficulty passing urine
  • Difficulty swallowing
  • Difficulty urinating
  • Dry mouth
  • Dry skin
  • Facial flushing
  • Fever
  • Fluid retention
  • Heart palpitations
  • Hiccups
  • High blood pressure (hypertension)
  • Indigestion or heartburn
  • Insomnia
  • Loss of appetite
  • Sexual side effects, such as impotence (erectile dysfunction, or ED), a decreased sex drive, or abnormal ejaculation
  • Stiff or shaky muscles
  • Sweating
  • Taste changes
  • Thirst
  • Unusual dreams
  • Voice changes
  • Weakness
  • Weight loss.
Alternative Therapies for Pain Management

Morphine Sulfate ER Medication

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