Health Information and Tools > Patient Care Handouts >  Learning About Opioids
Facebook Tweet Share

Main Content

Learning About Opioids


Opioids are medicines used to relieve moderate to severe pain. They may be used for a short time for pain, such as after surgery. Or in some cases a doctor might prescribe them for long-term pain. They don't cure a health problem. But they may help you manage the pain and function better.

Sometimes opioids are used for people who can't take other pain medicines. For example, you may take an opioid instead of a non-steroidal anti-inflammatory drug (NSAID—like ibuprofen) if you have poor kidney function or are at risk of bleeding.

Opioids are strong medicines. They can help you manage pain when you use them the right way. But they can cause serious harm and even death.

If you decide to take opioids, here are some things to remember.

  • Keep your doctor informed. You can develop opioid use disorder. Moderate to severe opioid use disorder is sometimes called addiction. The risk is higher if you have a history of substance use. Your doctor will monitor you closely for signs of opioid use disorder and to figure out when you no longer need to take opioids.
  • Make a treatment plan. The goal of your plan is to be able to function and do the things you need to do, even if you still have some pain. You might be able to manage your pain with other non-opioid options. These include cognitive behavioural therapy (CBT), physiotherapy, relaxation, non-opioid prescription pain medicine, and over-the-counter pain medicines.
  • Be aware of the side effects. Opioids can cause side effects, such as constipation, sleepiness, and nausea. And over time, you may need a higher dose to get pain relief. This is called tolerance. Your body also gets used to opioids. This is called physical dependence. If you suddenly stop taking them, you may have withdrawal symptoms. Serious risks of using opioids include overdose and death.


Opioids or other medicines that contain them include:

  • Codeine (Tylenol 3).
  • Hydromorphone (Dilaudid).
  • Oxycodone (Oxyneo).

Safety tips

If you need to take opioids to manage your pain, remember these safety tips.

  • Follow directions carefully. It's easy to misuse opioids if you take a dose other than what's prescribed by your doctor. This can lead to accidental overdose and even death. Even sharing them with someone they weren't meant for is misuse.
  • Be cautious. Opioids may affect your judgment and decision making. Do not drive or operate machinery while you take them. Talk with your doctor about when it is safe to drive.
  • Reduce the risk of drug interactions. Opioids can be dangerous if you take them with alcohol or with certain drugs like sleeping pills and muscle relaxers. The combination can decrease your breathing rate and lead to overdose or death. Make sure your doctor knows about all the other medicines you take, including over-the-counter medicines. Don't start any new medicines before you talk to your doctor or pharmacist.
  • Safely store and dispose of opioids. Store opioids in a safe and secure place. Make sure that pets, children, friends, and family can't get to them. When you're done using opioids, make sure to dispose of them safely and as quickly as possible. Health Canada recommends these disposal options.
    • The best option is to take your medicine to a community drug take-back program or return the medicine to the pharmacy. Visit to find take-back programs in your area.
    • If you can't get to a pharmacy or a take-back program isn't available in your area, you can throw them into your household trash if you follow Health Canada's instructions. Visit for specific instructions.
    • If you have opioid patches (used or unused), your options are to take them to a pharmacy or take-back program. Do not throw them in the trash.
    • Do not flush your medicine down the toilet or sink.
  • Reduce the risk of overdose. Opioids can be very dangerous. Protect yourself by asking your doctor or pharmacist about a take-home naloxone kit. It can help you—and even save your life—if you take too much of an opioid. You can get naloxone without a prescription at most drugstores or through a community Take Home Naloxone program.

Who is most at risk?

Your risk rises if you misuse opioids, take high doses, have certain health problems, or if you've overdosed before. You're also at higher risk if you use them with another substance, like alcohol, or take illegal opioids, or if you used them regularly and then take them again after you'd cut back or stopped.

When should you call for help?

Call 911 anytime you think you may need emergency care. For example, call if:

  • You have signs of an overdose. These include:
    • Slow, shallow, or stopped breathing.
    • Pinpoint pupils.
    • Blue or purple lips or fingertips.
    • No response when you ask questions, shake the person, or rub the person's breastbone with your knuckles.
    • Seizures.
  • You have symptoms of a severe allergic reaction. These may include:
    • Sudden raised, red areas (hives) all over your body.
    • Swelling of the throat, mouth, lips, or tongue.
    • Trouble breathing.
    • Passing out (losing consciousness). Or you may feel very light-headed or suddenly feel weak, confused, or restless.
    • Severe belly pain, nausea, vomiting, or diarrhea.

If you have a take-home naloxone kit, use it after you call 911.

Call your doctor or nurse advice line now or seek immediate medical care if:

  • You have symptoms of an allergic reaction, such as:
    • A rash or hives (raised, red areas on the skin).
    • Itching.
    • Swelling.
    • Mild belly pain or nausea.

Watch closely for changes in your health, and be sure to contact your doctor or nurse advice line if:

  • You think you might be taking too much pain medicine, and you need help to take less or stop.
  • Your medicine is not helping with the pain.
  • You are having side effects, such as constipation or trouble urinating.

Where can you learn more?

Go to

Enter F734 in the search box to learn more about "Learning About Opioids".

Adapted with permission from copyrighted materials from Healthwise, Incorporated (Healthwise). This information does not replace the advice of a doctor. Healthwise disclaims any warranty and is not responsible or liable for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.