[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Pharmacology](https://durgical.com/en/pharmacology/) › [Drugs of abuse](https://durgical.com/en/pharmacology/classes/drugs-of-abuse/) › Inhaled solvents

# Inhaled solvents

## Drugs of abuse?

Drugs of abuse

Glues, thinners, fuels and aerosols whose vapours are inhaled, mostly by adolescents. One session can trigger a fatal arrhythmia («sudden sniffing death»).

Updated Nov 1, 2026

Also called: Inhalants, Volatile solvents (toluene, xylene, gasoline, thinner), Aerosols and gases

## Quick facts

**Group**
[Drugs of abuse](https://durgical.com/en/pharmacology/classes/drugs-of-abuse/)

**Target**
NMDA and GABA-A receptors and other ion channels (anaesthetic-like actions)

**Used for**
No medical use · Clinical relevance

**Key effects**
Dizziness · Nausea and vomiting

**Monitor**
Continuous ECG · Arterial gases

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

On this page

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

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

- Study Test yourself

- Connections Connections

## Mechanism of action

Volatile hydrocarbons such as toluene dissolve into nerve membranes and act like general anaesthetics: they inhibit NMDA receptors and enhance GABA function, with effects on other receptors and voltage-gated channels. The result is brief euphoria and disinhibition, then CNS depression, confusion, ataxia, and at high exposure coma and seizures. They also sensitise the heart muscle to adrenaline, so a sudden surge (fright, exertion) can trigger ventricular fibrillation.

- Solvent vapour is inhaled and reaches the brain quickly
- NMDA inhibition and stronger GABA signalling
- Euphoria, then confusion, ataxia, coma
- Myocardium sensitised to adrenaline: risk of ventricular fibrillation

## Indications

- No medical use (nitrous oxide is a separate anaesthetic gas)
- Clinical relevance: hydrocarbon poisoning by inhalation or ingestion [Hydrocarbon ingestion and aspiration →](https://durgical.com/en/conditions/hydrocarbon-ingestion-and-aspiration/)

## Adverse effects

### Common

- Dizziness, headache, slurred speech and blurred vision
- Nausea and vomiting
- Euphoria and disinhibition followed by drowsiness
- Solvent smell on breath, skin or clothes; skin irritation

### Serious (rare, important)

- Sudden sniffing death from ventricular arrhythmia, even after a single use
- Asphyxia, coma and seizures
- Chemical pneumonitis if the liquid is aspirated
- Chronic toluene use: distal renal tubular acidosis with hypokalaemic weakness
- Chronic use: damage to myelin with cognitive, motor, visual and hearing loss; liver and kidney injury

## Contraindications

- No medical use: any recreational exposure is dangerous
- Catecholamines (adrenaline, noradrenaline, dopamine, dobutamine) are avoided in solvent-induced arrhythmias

## Key interactions

**Adrenaline and other catecholamines; sudden fright or exertion**
Ventricular arrhythmias in the sensitised heart

**Methanol used to adulterate thinner**
Added methanol poisoning with metabolic acidosis and blurred vision

**Alcohol and sedatives**
Deeper CNS and respiratory depression

## What is monitored

- Continuous ECG, oxygen saturation, heart rate and blood pressure
- Arterial gases, potassium, chloride, kidney and liver tests
- Chest X-ray if there was ingestion, cough or hypoxaemia
- Level of consciousness and breathing pattern

## Administration and safety

- Staff wear gloves and a mask; contaminated clothing is removed and the skin washed with soap and water
- After ingestion, vomiting is not induced and gastric lavage and activated charcoal are not used (aspiration risk)
- Arrhythmias are treated with lidocaine or a beta-blocker, not catecholamines

## Pregnancy and breastfeeding

Use in pregnancy is linked to low birth weight, slow growth, hearing loss and developmental delay in the infant.

## Nursing care

- Keep the patient calm and avoid startling them (adrenaline surge)
- Monitor the cardiac rhythm continuously
- Treat agitation or seizures with benzodiazepines as ordered
- Assess for suicide risk and refer to mental health and social support, especially in adolescents

## Pharmacokinetics

**Absorption**
Inhalation is the usual route; aromatic hydrocarbons are well absorbed through the lungs

**Distribution**
Very lipid-soluble: fast entry into the brain

**Onset and duration**
Effects start quickly and are short-lived

## Memory aid

SNIFF = Sudden death, Neurotoxic, Irregular heart, Fumes in the lungs, Falling potassium (toluene).

## Test yourself

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

## What is «sudden sniffing death»?

A fatal ventricular arrhythmia after solvent inhalation, because the solvent sensitises the heart to adrenaline.

## Which drugs are avoided for solvent-induced arrhythmias, and what is used instead?

Catecholamines (adrenaline, noradrenaline, dopamine, dobutamine) are avoided; lidocaine or a beta-blocker is used.

## Which kidney problem is typical of chronic toluene abuse?

Distal renal tubular acidosis with hypokalaemia and muscle weakness.

## Why is activated charcoal not given after hydrocarbon ingestion?

It does not help and increases the risk of vomiting and aspiration pneumonitis.

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## Connections

## Related conditions 1

- [Hydrocarbon ingestion and aspiration](https://durgical.com/en/conditions/hydrocarbon-ingestion-and-aspiration/)

[← Back to the class: Drugs of abuse](https://durgical.com/en/pharmacology/classes/drugs-of-abuse/)

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

Sources: [Guía para el Manejo de Emergencias Toxicológicas](https://minsalud.gov.co/sites/rid/Lists/BibliotecaDigital/RIDE/DE/GT/guias-manejo-emergencias-toxicologicas-outpout.pdf) (Ministerio de Salud y Protección Social; Organización Panamericana de la Salud, 2017); [Inhalants](https://nida.nih.gov/research-topics/inhalants) (National Institute on Drug Abuse (NIDA), 2024); [Drugs A to Z](https://nida.nih.gov/research-topics/commonly-used-drugs-charts) (National Institute on Drug Abuse (NIDA), 2025).

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Representative model, for educational purposes only.

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