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Morphine is a type of narcotic, opiate ingredient used in many different pain medications. Because it is classified as a controlled substance, there are special laws controlling its sale and use. The medication also has a significant potential for both psychological and physical dependence and abuse. Common side effects seen with this drug include constipation, drowsiness, and nausea.

What Is Morphine?

Morphine is an opiate pain reliever. It is an active ingredient in many different prescription medications. Morphine comes in many different forms, such as tablets, extended-release tablets or capsules, oral solution, or injectable solution.
The drug is a narcotic and is considered a "controlled substance" in the United States.
(Click Morphine Uses for more information, including possible off-label uses.)

How Does It Work?

Morphine is a narcotic, opiate pain reliever. It binds to opioid receptors throughout the body and produces numerous different effects. These effects include, but are not limited to:
  • Pain relief
  • Cough suppression
  • Drowsiness
  • Anxiety relief
  • Unusual unpleasant feelings (dysphoria) or unusual pleasant feelings (euphoria)
  • Decreased breathing (slow or shallow breathing)
  • Certain changes in the circulatory system
  • Slowing of the digestive tract
  • Release of histamine (which often causes itching)
  • Physical dependence.
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Morphine Drug Information

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