Endorphins & Enkephalins: The Body's Natural Painkillers

Your body comes equipped with its own pharmacy of painkillers — and understanding them explains one of the most important reasons we favor non-opioid strategies for chronic pain.

The body's built-in morphine

Alongside the nerve tracts that carry pain signals up to the brain, you have tracts running down from the brain that suppress pain. They work using naturally occurring, opiate-like chemicals your body manufactures: endorphins (the word compresses "endogenous morphine" — the morphine within) and their smaller relatives, enkephalins (meaning "in the head"). These act on the very same receptor sites in the brain and spinal cord that opioid drugs like morphine target. When morphine is injected, it works precisely because it mimics these compounds your body already makes.

When your own painkillers switch on

Certain intense or stressful situations activate this system powerfully. It's why a linebacker can finish a play on a broken leg, or a soldier can carry a wounded comrade to safety without registering his own injuries. In those moments, the brain's descending pathways flood the system with its own painkillers and briefly block pain that would otherwise be overwhelming. Everyday versions exist too — the relief you get from rubbing a sore spot, or the calm after hard exercise, both tap this system.

Why this matters for opioid treatment

Here's the crucial insight, and the reason this page exists. Taking man-made opioids over the long term can overwhelm and suppress your body's own ability to respond to endorphins and enkephalins. In other words, for chronic pain that isn't due to cancer, starting long-term narcotics can make you less responsive to your own natural pain defenses — which is part of what makes the drugs hard to stop and, over time, less effective. The system that should be helping you gets turned down precisely when you need it most.

This isn't an argument against opioids everywhere — they remain appropriate for acute pain, post-surgical pain, and cancer pain. It's an argument for thinking carefully before committing chronic non-cancer pain to long-term narcotics, and for favoring treatments that work with your natural pain-control system rather than suppressing it: exercise, which boosts endorphins; nerve-pain medications that calm abnormal signaling; interventional procedures that quiet pain at its source; and the sleep and stress management that keep your endorphin system functioning. It's also why some clinicians consider medications that don't suppress the body's own painkillers as earlier options.

Pain management is a complex subject, and the goal is always to help your body do what it's designed to do. To build a plan that works with your natural defenses rather than against them, call Newport Pain Management at (949) 759-8400.

This article is for general education and is not a substitute for individual medical advice.