Skip to main content
More Search Options
A member of our team will call you back within one business day.
MORPHINE; NALTREXONE (MOR feen; nal TREX one) is a pain reliever. It is used to treat moderate to severe pain that lasts for more than a few days.
This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.
They need to know if you have any of these conditions:
adrenal gland problems, Addison's disease
constipation or other intestinal disease
drug abuse or addiction
if you frequently drink alcohol-containing drinks
kidney disease or problems urinating
lung disease, asthma, or breathing problems
problems with gallbladder or pancreas
an unusual or allergic reaction to morphine, naltrexone, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. If the medicine upsets your stomach, take the medicine with food or milk. Swallow this medicine whole. Or, if you have problems swallowing the capsule, you may carefully open it and sprinkle the contents on a small amount of cold applesauce. Immediately swallow all of the applesauce. Do not save it for later. Do not chew the applesauce. Do not let the medicine dissolve in the applesauce. After you take the medicine, rinse your mouth with water. None of the medicine should stay in your mouth. Take your medicine at regular intervals. Do not take it more often than directed. Do not stop taking except on your doctor's advice.
This medicine can be very dangerous if you take it wrong. Do not dissolve, crush, or chew the capsules or the pellets inside the capsule. If you crush or break the pellets you may get too much medicine.
A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.
Talk to your pediatrician regarding the use of this medicine in children. This medicine is not approved for use in children.
Overdosage: If you think you've taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Do not take this medicine with any of the following medications:
alcohol or any product that contains alcohol
This medicine may also interact with the following medications:
antihistamines for allergy, cough and cold
barbiturates, like phenobarbital
MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate
medicines for bladder problems like oxybutynin, tolterodine
medicines for depression, anxiety, or psychotic disturbances
medicines for Parkinson's disease like benztropine, trihexyphenidyl
medicines for sleep
narcotic medicines (opiates) for pain
some medicines for stomach problems like dicyclomine, hyoscyamine
some medicines for travel sickness like scopolamine
This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.
Tell your doctor or health care professional if your pain does not go away, if it gets worse, or if you have new or a different type of pain. You may develop tolerance to the medicine. Tolerance means that you will need a higher dose of the medicine for pain relief. Tolerance is normal and is expected if you take morphine for a long time.
Do not suddenly stop taking your medicine because you may develop a severe reaction. Your body becomes used to the medicine. This does NOT mean you are addicted. Addiction is a behavior related to getting and using a drug for a non-medical reason. If you have pain, you have a medical reason to take pain medicine. Your doctor will tell you how much medicine to take. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
There are different types of narcotic medicines (opiates) for pain. If you take more than one type at the same time, you may have more side effects. Give your health care provider a list of all medicines you use. Your doctor will tell you how much medicine to take. Do not take more medicine than directed. Call emergency for help if you have problems breathing.
This medicine will cause constipation. Try to have a bowel movement at least every 2 to 3 days. If you do not have a bowel movement for 3 days, call your doctor or health care professional.
Your mouth may get dry. Drinking water, chewing sugarless gum, or sucking on hard candy may help. See your dentist every 6 months.
Side effects that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
feeling faint or lightheaded
slow or fast heartbeat
trouble passing urine or change in the amount of urine
unusually sleepy, not able to stay awake
Side effects that usually do not require medical attention (Report these to your doctor or health care professional if they continue or are bothersome.):
This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Keep out of the reach of children.
This medicine can be abused. Keep your medicine in a safe place to protect it from theft. Do not share this medicine with anyone. Selling or giving away this medicine is dangerous and against the law.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F).
Discard unused medicine and used packaging carefully. Pets and children can be harmed if they find used or lost packages. Flush any unused medicines down the toilet. Do not use the medicine after the expiration date. Follow the directions in the MedGuide.
NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.