[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Pharmacology](https://durgical.com/en/pharmacology/) › [Opioids and antagonists](https://durgical.com/en/pharmacology/classes/opioids-and-antagonists/) › Tapentadol

# Tapentadol

## Opioids and antagonists?

Opioids and antagonists

## High alert?

An error with this medicine can cause serious harm: double checks and protocols are used.

A strong opioid that also blocks noradrenaline reuptake. Used for severe acute pain; it carries all opioid risks plus serotonin syndrome.

Updated Nov 1, 2026

## Quick facts

**Group**
[Opioids and antagonists](https://durgical.com/en/pharmacology/classes/opioids-and-antagonists/)

**Target**
μ-opioid receptor and noradrenaline transporter

**Key effects**
Nausea and vomiting · Dizziness · Somnolence

**Monitor**
Respiratory rate · Pain score

**ATC**
N02AX06

No doses: the clinician sets them by the current guideline.

On this page

- The basics Mechanism of action
- Indications
- Adverse effects
- Pharmacokinetics
- Memory aid

- Clinical What the labels mean

- Safety Contraindications
- Key interactions
- What is monitored
- Administration and safety
- Pregnancy and breastfeeding
- Nursing care

- Study Test yourself

- Connections Connections

## Mechanism of action

◎**μ-opioid receptor and noradrenaline transporter**Tapentadol

ⓘ The figure shows morphine in the μ receptor; tapentadol acts at the same site. There is no structure of tapentadol on a human target.

**Target in 3D:** μ-opioid receptor and noradrenaline transporter. PDB structure 8EF6 (RCSB PDB, public domain). [View the structure at RCSB PDB](https://www.rcsb.org/structure/8EF6) · Drag to rotate · pinch to zoom

Tapentadol is a μ-opioid receptor agonist and a noradrenaline reuptake inhibitor in one molecule. The opioid effect reduces pain transmission and perception; the extra noradrenaline strengthens the descending pathways that inhibit pain in the spinal cord. It needs no metabolic activation.

- Activates μ-opioid receptors on pain pathways
- Also blocks noradrenaline reuptake in the spinal cord
- Both effects add up to analgesia

## Indications

- Acute pain severe enough to need an opioid when other treatments are not enough

## Adverse effects

### Common

- Nausea and vomiting
- Dizziness
- Somnolence
- Constipation

### Serious (rare, important)

- Life-threatening respiratory depression
- Addiction, abuse and misuse; fatal accidental ingestion, especially by children
- Deep sedation, coma and death when combined with benzodiazepines, alcohol or other depressants
- Neonatal opioid withdrawal syndrome after prolonged use in pregnancy
- Serotonin syndrome with serotonergic drugs; seizures

## Contraindications

- Significant respiratory depression
- Acute or severe asthma without monitoring or resuscitation equipment
- Known or suspected bowel obstruction, including paralytic ileus
- MAO inhibitors now or in the last 14 days

## Key interactions

**Benzodiazepines, alcohol and other CNS depressants**
Additive sedation and respiratory depression, with risk of death

**SSRIs, SNRIs, tricyclics, triptans and other serotonergic drugs**
Serotonin syndrome

**MAO inhibitors**
Contraindicated together or within 14 days

## What is monitored

- Respiratory rate, sedation level and oxygen saturation, above all at the start and after dose changes
- Pain score, bowel habit and signs of misuse
- Signs of serotonin syndrome (agitation, fever, tremor, clonus)

## Administration and safety

- Controlled medicine (Schedule II in the United States): counted, stored locked and documented
- Oral tablets are swallowed whole; crushing or dissolving them for injection is dangerous
- Look-alike risk with other opioids of similar name: check the name and the formulation

## Pregnancy and breastfeeding

Prolonged use in pregnancy can cause neonatal opioid withdrawal syndrome.

## Nursing care

- Check breathing rate and sedation before each dose and hold the drug if the patient is hard to wake
- Keep naloxone available and know the local overdose protocol
- Start a bowel regimen and watch for urinary retention
- Teach safe storage away from children, no alcohol and no driving while drowsy
- Review antidepressants and other serotonergic drugs before the first dose

## Pharmacokinetics

**Absorption**
About 32% bioavailable because of first-pass metabolism

**Metabolism**
Mainly glucuronidation; minor CYP2C9, CYP2C19 and CYP2D6 steps; no active metabolites

**Elimination**
Almost entirely by the kidneys

**Half-life**
About 4 hours

## Memory aid

Tapentadol: «TAP the μ, TAP the NE» – two mechanisms, one molecule; watch serotonin and MAOIs.

## Test yourself

Think of the answer, then tap the question to see it.

## Which two actions give tapentadol its analgesia?

μ-opioid agonism and noradrenaline reuptake inhibition.

## Unlike tramadol, does tapentadol need a CYP2D6 metabolite to work?

No. It has no active metabolites; it is mainly glucuronidated.

## Which drug class is contraindicated within 14 days?

MAO inhibitors.

[Add to my cards (3)](https://durgical.app/estudiar/?add=/en/pharmacology/tapentadol/)

[More Pharmacology questions →](https://durgical.com/en/practice/?f=pharmacology)

## What the labels mean

**High alert**
An error with this medicine can cause serious harm: double checks and protocols are used.

## Connections

## Related drugs 4

- [Tramadol](https://durgical.com/en/pharmacology/tramadol/)
- [Morphine](https://durgical.com/en/pharmacology/morphine/)
- [Oxycodone](https://durgical.com/en/pharmacology/oxycodone/)
- [Naloxone](https://durgical.com/en/pharmacology/naloxone/)

[← Back to the class: Opioids and antagonists](https://durgical.com/en/pharmacology/classes/opioids-and-antagonists/)

Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given.

Sources: [DailyMed - TAPENTADOL- tapentadol hydrochloride tablet, film coated](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=863f3fd3-1e8d-41b0-855f-8f9a29237cda) (DailyMed (U.S. National Library of Medicine), 2026); [ATCDDD - ATC/DDD Index](https://atcddd.fhi.no/atc_ddd_index/?code=N02AX06) (WHO Collaborating Centre for Drug Statistics Methodology, 2026).

## **Spotted a mistake?** We are always improving for the community. Tell us what is wrong and our team will review it. Report a mistake

Representative model, for educational purposes only.

---
Source: https://durgical.com/en/pharmacology/tapentadol/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/pharmacology/tapentadol/