Tolerance is your body adapting so a substance does less at the same dose. It pushes people to take more — and the most dangerous moment is not when tolerance is high, but right after it drops.
How it works
Use a substance regularly and you need more for the same effect. Related substances often share tolerance (cross-tolerance) — e.g. most psychedelics, or different opioids — so switching doesn't reset it.
Tolerance also fades during a break. That sounds good, but it is exactly where overdoses happen.
The post-break overdose After a break — including time in jail, hospital, or treatment — your tolerance can be a fraction of what it was. Returning to your old dose is a leading cause of fatal opioid overdose. Re-start low, every time.
Reset and manage tolerance
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1
Take regular breaks Spacing use out keeps tolerance — and the dose you need — lower, and protects your longer-term health.
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2
After any break, treat yourself as a beginner Re-start at a low dose and titrate up. Do not pick up where you left off.
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3
Track your use Notes on dose and frequency make rising tolerance (and creeping use) visible before it becomes a problem.
✓ Do
- Restart low after any break, especially with opioids.
- Build in tolerance breaks to keep doses down.
- Keep naloxone around opioids after a period of abstinence.
✕ Don't
- Don't return to your pre-break dose.
- Don't chase a faded effect by stacking doses.
- Don't assume switching to a related substance resets tolerance.