Buprenorphine Facts
Opioid;
Description
Buprenorphine is a semi-synthetic opioid of the orvinol class. It is structurally related to morphine but only partially activates opioid receptors rather than fully switching them on. This partial activation suppresses pain while placing a ceiling on both euphoria and dangerous breathing slowdown.
Subjective effects include pain suppression, sedation, reduced anxiety, quiet warmth, and muted euphoria. The experience is defined by a ceiling — physical discomfort and emotional tension recede into a calm that plateaus rather than deepening, with an anxiolytic quality distinct from classical opioid reward.[1][2][3]
Buprenorphine produces moderate physical dependence, with a wider safety margin than full-agonist opioids.[4] That margin disappears with benzodiazepines, which deepen respiratory depression beyond what buprenorphine alone can cause — this combination accounts for most buprenorphine fatalities.[5]
Dose and durationby route · individual sensitivity varies
Starts in 30 – 60 minLasts 18 – 24 hoursAfter-effects 24 – 72 hours
Body and dependence
- Acute toxicity
- Low
- Chronic toxicity
- Low
- Physical dependence
- Moderate
- Psychological dependence
- Moderate
- Withdrawal
- Moderate
- Compulsive redosing
- Low
Tolerance
- Builds
- Moderate
- Fully resets after
- 10 days
- Carries over to
- opioids
Effectslikely at a common dose
- Perception
- none likely · 2 possible
- Body
- Pain suppression;
Constipation; Pupil constriction; Body high; +19 possible, including Nausea, Dizziness, Excessive sweating - Thinking
- none likely · 11 possible, including Cognitive impairment, Analysis suppression, Decision impairment
- Feeling
- none likely · 4 possible, including Empathy suppression
- Self
- none likely · 3 possible, including Communication suppression
Who shouldn't take it
Combinations65 recorded
Seek help immediately if
- Unresponsive / can't be woken, even to a firm sternal rub
- Slow, shallow, or stopped breathing
- Pinpoint pupils
- Blue/grey lips, fingertips, or skin (cyanosis)
- Limp body; pale, clammy skin
- Choking or gurgling sounds ("death rattle")
- Slow, erratic, or absent pulse
What to do
- Try to wake them — shout their name, firm sternal rub
- Call emergency services immediately
- Administer naloxone if available
- Give rescue breaths (or CPR if there is no pulse)
- Place them in the recovery position
- Stay with them; re-dose naloxone every 2–3 minutes if there is no response
- Reversal agent
- Naloxone (Narcan) — opioid antagonist. May require repeated doses; its effect can wear off before the opioid does.
With prompt naloxone and rescue breathing, reversal is usually rapid. Because naloxone can wear off before the opioid — especially with long-acting opioids (methadone) or high-potency ones (fentanyl) — a period of monitoring is needed even after the person revives.
988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE
References
- [1]^Clark TP (2022) The history and pharmacology of buprenorphine: New advances in cats — Journal of Veterinary Pharmacology and Therapeutics doi:10.1111/jvp.13073
- [2]^Robinson SA, Erickson RL, Browne CA, Lucki I (2017) A role for the mu opioid receptor in the antidepressant effects of buprenorphine — Behavioural Brain Research doi:10.1016/j.bbr.2016.10.050
- [3]^Stefanowski B, Antosik-Wojcinska A, Swiecicki L (2020) The use of buprenorphine in the treatment of drug-resistant depression - an overview of the studies — Psychiatria Polska doi:10.12740/pp/102658
- [4]^Borron SW, Monier C, Risede P, Baud FJ (2002) Flunitrazepam variably alters morphine, buprenorphine, and methadone lethality in the rat — Human and Experimental Toxicology PMID:12507255
- [5]^Mégarbane B, Hreiche R, Pirnay S, Marie N, Baud FJ (2006) Does high-dose buprenorphine cause respiratory depression?: possible mechanisms and therapeutic consequences — Toxicological Reviews PMID:16958555