Side effects that you may experience while using Morphine

In addition to much needed effects, there are many unwanted side effects associated with morphine. In case you experience any of these side effects, you need to call your medical help immediately. Let us learn about the side effects that you may experience while using Morphine

Major Side effects that need immediate medical attentions are

Less Common

  • blurred vision
  • confusion
  • cough
  • fainting
  • decreased urination
  • headache
  • appetite loss
  • increased sweating
  • irregular, pounding, fast pulse or heartbeat
  • skin rash, itching or hives
  • nervousness
  • breathlessness
  • severe vomiting
  • severe constipation
  • shakiness in feet, hands or legs
  • slow heartbeat
  • chills or sweating
  • wheezing
  • faintness, dizziness or light-headedness while rising suddenly from a sitting or lying position
  • numbness, prickling, burning, crawling and itching or tingling feelings
  • stomach or abdominal pain

Occurrence not known

  • clammy or cold skin
  • feeling of heat or warmth
  • tarry, black stools
  • painful urination
  • light-headedness
  • irregular, pounding, fast pulse or heartbeat
  • pale skin
  • unconsciousness
  • blue or pale lips, skin or fingernails
  • unsteady walk or shakiness
  • redness or flushing of skin, especially on neck and face
  • low pulse or blood pressure
  • slow heartbeat
  • trembling, unsteadiness or problems in muscle coordination or control

Symptoms of overdose– if these symptoms persist, call your doctor immediately

  • fever
  • extreme drowsiness
  • pinpoint, constricted or small pupils
  • increased thirst
  • increased BP
  • muscle stiffness or pain
  • lower side or back pain
  • muscle spasms or cramps
  • severe sleepiness
  • swelling of lower legs, fingers or face
  • weight gain
  • mo muscle movement or muscle tone


Minor side effects- Morphine

Some minor side effects that occur as a result of morphine go away with time as your body gets used to the medication. These minor side effects do not need medical attention, but if these side effects last for longer period, then you need to discuss with your doctor.

More Common

  • drowsiness
  • cramps
  • calm feeling
  • false sense of feeling well
  • weight loss
  • problems with bowel movement

Less common

  • agitation
  • dry mouth
  • vision changes
  • unusual, bad or unpleasant taste
  • floating feeling
  • face is hot or warm to touch
  • loss in sexual drive, desire, ability or performance
  • night blindness
  • indigestion or heartburn
  • missed, irregular or absent menstrual periods
  • skin rash
  • sleeping problems
  • skin redness
  • muscle control problems
  • stomach pain, upset or discomfort
  • eye movement not in control
  • muscle tightness or stiffness

Occurrence not known

  • abnormal dreams
  • delusions
  • confusion regarding person, place or time
  • general feeling of illness or discomfort
  • memory problems
  • spinning sensation
  • unusual restlessness, nervousness or excitement
  • holding some false beliefs
  • unsteadiness or clumsiness

The side effects can be severe at times, do not ignore any unusual symptoms that indicate some serious side effects and seek medical help immediately.

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