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Duramorph PF (injection)

Generic name: morphine (injection)

Brand names: Duramorph PF, Infumorph, Mitigo

Used for chronic pain
Last updated November 2, 2026 0 views
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What is Duramorph PF?

Duramorph PF is an opioid medicine that treats severe chronic pain in adults and children when other treatments are not suitable.

Duramorph PF might also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

Warnings

Never share opioid medicine with another person, especially someone with a history of drug addiction. MISUSE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medicine where others cannot get to it. Selling or giving away Duramorph PF is against the law.

Fatal side effects may occur if you also drink alcohol or use other drugs that cause drowsiness or slow breathing.

Using opioid medicine during pregnancy may cause life-threatening withdrawal symptoms in the newborn.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use Duramorph PF if you are allergic to it, or if you have:

  • severe asthma or breathing problems;
  • used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, or tranylcypromine; or
  • a stomach or bowel obstruction (including paralytic ileus).

Tell your doctor if you have or have ever had:

  • breathing problems, sleep apnea (breathing that stops during sleep);
  • a head injury, brain tumor, or seizures;
  • a drug or alcohol addiction, or mental illness;
  • urination problems;
  • problems with your bile duct, pancreas, or adrenal gland; or
  • kidney or liver disease.

If you use Duramorph PF during pregnancy, your baby could be born with life-threatening withdrawal symptoms and may need medical treatment for several weeks. Tell your doctor if you are pregnant or plan to become pregnant.

Ask a doctor before using an opioid medicine if you are breastfeeding. Tell your doctor if you notice severe drowsiness or slow breathing in the nursing baby.

Duramorph PF may affect fertility in men or women when used for an extended period of time. Ask your doctor about your individual risk.

This section was rewritten for readability and reviewed for meaning.

Duramorph PF side effects

Get emergency medical help if you notice signs of an allergic reaction: hives, trouble breathing, or swelling of your face, lips, tongue, or throat.

Opioid medicine can slow or stop your breathing, and death may happen. A person taking care of you should give naloxone and/or get emergency medical help if you have slow breathing with long pauses, blue lips, or if you are hard to wake up.

Duramorph PF may cause serious side effects. Call your doctor right away if you experience:

  • slow heart rate, sighing, shallow breathing, or breathing that stops;
  • extreme drowsiness, feeling faint;
  • flushing (sudden warmth, redness, or tingling);
  • a seizure;
  • opioid induced severe pain;
  • low levels of sex hormones (androgens);
  • low blood sugar--headache, hunger, weakness, sweating, confusion, irritability, dizziness, fast heart rate, or feeling jittery;
  • high levels of serotonin in the body--agitation, hallucinations, fever, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, diarrhea; or
  • low cortisol levels--nausea, vomiting, loss of appetite, dizziness, worsening tiredness or weakness.

Serious breathing problems may be more likely in older adults and people who are weak or have wasting syndrome or chronic breathing disorders.

Common side effects of Duramorph PF may include:

  • breathing problems;
  • drowsiness, dizziness;
  • constipation, nausea, vomiting;
  • sweating; or
  • numbness, tingling, or cold feeling in your hands and feet.

This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

This section was rewritten for readability and reviewed for meaning.

How is Duramorph PF given?

Follow the directions on your prescription label and read all medication guides or instruction sheets. Never use Duramorph PF in larger amounts, or for longer than prescribed. Tell your doctor if you feel an increased urge to use more of Duramorph PF.

Never share opioid medicine with another person, especially someone with a history of drug addiction. MISUSE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medicine where others cannot get to it. Selling or giving away this medicine is against the law.

A healthcare provider will give you this injection.

You may have withdrawal symptoms if you stop using Duramorph PF suddenly. Ask your doctor before stopping the medicine.

Store at room temperature away from moisture and heat. Keep the auto-injector in its original container until you are ready to use it.

Keep your medicine in a place where no one can use it improperly.

Do not keep leftover medicine. Just one dose can cause death in someone using it accidentally or improperly. Ask your pharmacist about a drug take-back program, or flush the unused medicine down the toilet.

What happens if I miss a dose?

Call your doctor for instructions if you miss an appointment for your Duramorph PF (injection).

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An opioid overdose can be fatal, especially in a child or another person using the medicine without a prescription. Overdose symptoms may include severe drowsiness, pinpoint pupils, slow breathing, or no breathing.

Your doctor may recommend you get naloxone (a medicine to reverse an opioid overdose) and keep it with you at all times. A person caring for you can give the naloxone if you stop breathing or do not wake up. Your caregiver must still get emergency medical help and may need to perform CPR (cardiopulmonary resuscitation) on you while waiting for help to arrive.

Anyone can buy naloxone from a pharmacy or local health department. Make sure any person caring for you knows where you keep naloxone and how to use it.

Do not drink alcohol. Dangerous side effects or death could occur.

Avoid driving or hazardous activity until you know how Duramorph PF will affect you. Dizziness or drowsiness can cause falls, accidents, or severe injuries.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Duramorph PF?

Many other drugs can be dangerous when used with opioid medicine. Tell your doctor if you also use:

  • medicine for allergies, asthma, blood pressure, motion sickness, irritable bowel, or overactive bladder;
  • other opioid medicines;
  • a benzodiazepine sedative like Valium, Klonopin, or Xanax;
  • sleep medicine, muscle relaxers, or other drugs that make you drowsy; or
  • drugs that affect serotonin, such as antidepressants, stimulants, or medicine for migraines or Parkinson's disease.

This list is not complete. Many drugs may affect Duramorph PF, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Common questions about Duramorph PF

What drugs cause pinpoint pupils?
Pinpoint pupils, medically termed miosis, refer to abnormally small, constricted pupils that do not dilate appropriately in low light. This symptom can be caused by opioids, clonidine, buspirone, metoclopramide, and other medications. Continue reading
Which drugs cause opioid-induced constipation?
Any drug that is classified as an "opioid" can cause constipation, which can be a serious side effect if not addressed. Examples of commonly prescribed opioids that may cause this side effect include morphine, tramadol, fentanyl, methadone, hydrocodone, codeine and oxycodone. Continue reading
How does fentanyl compare to heroin or other opiates?
Fentanyl is an extremely potent, synthetic (man-made) opioid, and is about 50 times more potent than heroin and 100 times more potent than morphine. Fentanyl is a legally prescribed drug for pain in the U.S. and is classified as Schedule II controlled substance when used for legitimate medical purposes. In contrast, heroin is 2 to 3 times more powerful than morphine. Heroin is illegal in the U.S. and is classified as a Schedule I controlled substance. Continue reading

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.