Tolerance, Dependence, and Addiction

Over time, the brain can get used to opioids and build up a higher tolerance. This can mean the same dose may not relieve pain as effectively, or patients may feel they need a larger dose to get the same relief. If this happens, it’s important to talk to a healthcare provider about adjusting or switching treatments.

Physical dependence develops when the body gets used to having opioids and starts to rely on them to function or to feel normal. When someone is dependent on opioids, missing a dose or suddenly stopping can cause withdrawal symptoms like anxiety, irritability, muscle aches, excessive sweating, nausea, and vomiting.

Opioids can affect the brain in ways that make it harder to control cravings. Opioid Use Disorder (OUD) is a medical condition that causes a strong urge to keep taking opioids, even when they cause problems at work, at home, or in relationships. OUD is diagnosed using specific medical criteria. People with OUD may take more opioids than they mean to, or they may feel unable to stop even if they want to.

If you or someone you know shows signs of OUD, talk to a healthcare provider. There are safe and effective treatments that can support recovery.