Opioids are a type of drug derived from the opium poppy plant. They cause a variety of effects, including pain relief. Opioids include both legal substances, like prescription opioids, and illegal substances, like heroin. Opioids can also be:
- naturally occurring like morphine
- semi-synthetic like oxycodone
- synthetic (fully lab-made) like fentanyl
When prescribed, they typically treat moderate to severe pain. They can also cause euphoria, or a “high.”
You can take prescription opioids orally or receive them intravenously (IV). Both methods carry risks. Risk may be greater with IV use since it puts the opioid right into your bloodstream, heightening its effects.
Keep reading to learn more about the benefits and risks of IV opioid use.
IV opioids aren’t usually the first choice in many situations. But they may be necessary if there are no other options for administering the drug. You might receive opioids by IV in the following situations:
- Sedation: Hospitals may use IV opioids as a component of anesthesia for surgery.
- Post-operation: While in hospital, you may receive opioids by IV to help with pain management.
- Emergencies: If you show up to the emergency department in acute pain, depending on your condition, you may receive IV opioids, like morphine, while waiting. This is especially true for people with cancer.
- Malabsorption: If someone cannot absorb nutrients or medication because of gastrointestinal absorption issues, IV medication, including opioids, is an option.
Almost all opioids are available intravenously. A
Opioids, whether intravenous or not, carry with them serious risks. Common concerns include:
- tolerance (your body may get used to the dosage and need more to get the same effect)
- physical dependence (symptoms of withdrawal when you stop taking it)
Significant side effects can also occur. These include:
- nausea, vomiting, dry mouth
- lowered testosterone
- itching or sweating
IV opioids come with some additional risks.
You may have concerns about opioid use disorder (OUD), but this is extremely unlikely from short-term IV opioid use. OUD develops over prolonged opioid use.
Since IV opioids start to work much faster, they have a stronger effect on your brain’s reward system and can
It’s important to critically evaluate whether IV opioid use is necessary and whether it’s the best course of action. There may be alternative treatments or ways to minimize the amount of opioids given while still adequately managing pain.
Depending on why you’re getting IV opioids, there may be alternatives your doctor can use.
- Oral: Taking opioids by mouth is the preferred method in most cases. While it has a lower risk of adverse effects, it’s also a slower delivery method than IV. The slower absorption into the bloodstream slightly reduces the “high.”
- Subcutaneous: Opioids can be injected under your skin rather than directly into your veins. Doctors often see this as a middle ground between oral and IV use. A
2018 studyrecommends subcutaneous use if oral use is not a possibility.
- Transdermal: Some opioids, like fentanyl and buprenorphine, are available as a patch you wear on your skin. A
2017 studyconcluded that transdermal opioids were safe and effective in managing pain among people with cancer.
- Intranasal: A
small 2020 studyfound that fentanyl taken as a nasal spray may be just as effective in treating pain in cancer patients as IV hydromorphone.
In some cases, your doctor may prefer to use NSAIDs. While they’re less effective initially than opioids, they have an equal effect to opioids within
Depending on the type and severity of your pain, other possible alternatives include:
- nerve blocks
- physical therapy
- transcutaneous electrical nerve stimulation (TENS)
- spinal cord stimulation (TCS)
Discuss with your healthcare team which options might be best for you.
It’s always a good idea to talk with your doctor, even if it’s just to get clarification or to better understand your treatment or situation. Questions to ask about IV opioids can include:
- Why do I need this drug, and why do I need it intravenously?
- How long will I be on this?
- How can I minimize any risks or side effects?
- What if I have a history of opioid use disorder or substance use disorder?
- Are there any alternative treatments?
If you’re living with or have lived with OUD or substance use disorder, talk with your healthcare team about this to the level of your comfort. Giving as much information as possible is always safest and best, but everyone has different comfort levels with this topic.
Support for people with opioid use disorder
If you need extra support or recovery resources, check out the Substance Abuse and Mental Health Services Administration helpline at 800-662-HELP(4357).
If you have complete or partial hearing loss, the TDD number is 800-447-4889.
Opioids are powerful pain-relieving medications, but they also have the potential for misuse and the development of opioid use disorder. This risk is higher when you receive opioids intravenously.
While IV opioids are not the first-line treatment for many conditions, doctors use them in certain situations, like during or after surgery, or if someone cannot take medication by mouth for any reason.
There’s a very low risk of opioid use disorder after short-term IV use. If this is a concern for you, talk with your healthcare team about your concerns.
Discussing options with your healthcare team can help minimize side effects and the potential for overdose with IV opioids. Feel free to ask questions so you can be well-informed and be involved in making decisions about your treatment.