This medication is used to help relieve severe ongoing pain (such as due to cancer). Morphine belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain.
The higher strengths of this drug (100 milligrams or more per tablet) should be used only if you have been regularly taking moderate to large amounts of opioid pain medications. These strengths may cause overdose (even death) if taken by a person who has not been regularly taking opioids.
How to use
Read the Medication Guide provided by your pharmacist before you start using morphine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication on a regular schedule as directed by your doctor, not as needed for sudden (breakthrough) pain. Take this drug with or without food as directed by your doctor, usually every 8 hours or 12 hours. Some brands should only be taken every 12 hours. If you have nausea, it may help to take this drug with food. Ask your doctor or pharmacist about other ways to decrease nausea (such as lying down for 1 to 2 hours with as little head movement as possible). If nausea persists, see your doctor.
Swallow the tablets whole. Do not break, crush, chew, or dissolve the tablet. Doing so can release all of the drug at once, increasing the risk of morphine overdose.
The dosage is based on your medical condition and response to treatment. Do not increase your dose or use this drug more often or for longer than prescribed, because your risk of side effects may increase. Properly stop the medication when so directed.
Before you start taking this medication, ask your doctor or pharmacist if you should stop or change how you use your other opioid medication(s). Other pain relievers (such as acetaminophen, ibuprofen) may also be prescribed. Ask your doctor or pharmacist about using morphine safely with other drugs.
Nausea, vomiting, constipation, sweating, lightheadedness, dizziness, or drowsiness may occur. Some of these side effects may decrease after you have been using this medication for a while. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
To prevent constipation, eat dietary fiber, drink enough water, and exercise. You may also need to take a laxative. Ask your pharmacist which type of laxative is right for you.
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
An empty tablet shell may appear in your stool. This effect is harmless because your body has already absorbed the medication.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Warnings & Precautions
Before taking morphine, tell your doctor or pharmacist if you are allergic to it; or to other opioid pain medications (such as codeine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: brain disorders (such as head injury, tumor, seizures), breathing problems (such as asthma, sleep apnea, chronic obstructive pulmonary disease-COPD), kidney disease, liver disease, mental/mood disorders (such as confusion, depression), personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), stomach/intestinal problems (such as blockage, constipation, diarrhea due to infection, paralytic ileus), difficulty urinating (such as due to enlarged prostate), disease of the pancreas (pancreatitis), gallbladder disease.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.
Some products that may interact with this drug include: certain pain medications (mixed opioid agonist/antagonists such as pentazocine, nalbuphine, butorphanol), naltrexone.