Back Pain Home > Morphine Sulfate

As a type of narcotic, morphine sulfate is an opiate ingredient that can help relieve pain. This drug is found in many prescription pain relievers and is classified as a controlled substance, meaning there are special laws controlling its sale and use. Although most people tolerate it well, there are possible side effects, such as nausea, drowsiness, and constipation.

What Is Morphine Sulfate?

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

Side Effects

As with any medicine, morphine sulfate can cause side effects. However, not everyone who takes the drug will experience side effects. Most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider. Serious side effects are less common.
Common side effects of morphine sulfate include, but are not limited to:
  • Lightheadedness or dizziness
  • Drowsiness
  • Nausea or vomiting
  • Sweating
  • An unusual unpleasant feeling (dysphoria) or an unusual pleasant feeling (euphoria)
  • Constipation (see Morphine and Constipation).
(Click Side Effects of Morphine Sulfate to learn more, including potentially serious side effects that you should report immediately to your healthcare provider.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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