Morphine (Injection Route)

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Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

• Difficult or troubled breathing
• Irregular, fast or slow, or shallow breathing
• Pale or blue lips, fingernails, or skin
• Shortness of breath
• Very slow breathing

• Blurred vision
• Convulsions
• Decrease in frequency of urination
• Decrease in the amount of urine
• Difficulty in passing urine (dribbling)
• Dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
• Painful urination
• Sweating
• Unusual tiredness or weakness

Get emergency help immediately if any of the following symptoms of overdose occur:

• Bluish lips or skin
• Dizziness
• Fainting
• Irregular heartbeat
• Lightheadedness
• Low blood pressure or pulse
• Slow heartbeat
• Unconsciousness

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Absent, missed, or irregular menstrual periods
• Anxiety
• Confusion
• Decreased interest in sexual intercourse
• Delusions
• Depersonalization
• Difficulty having a bowel movement (stool)
• False or unusual sense of well-being
• Hallucinations
• Headache
• Inability to have or keep an erection
• Itching skin
• Loss in sexual ability, desire, drive, or performance
• Menstrual changes
• Nausea and vomiting
• Stopping of menstrual bleeding

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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