Leaflet ENTONOX 50% / 50% compressed medicinal gas


Indicated for: general anesthesia; procedural sedation

Route of administration: inhalation

Substance: nitrous oxide + oxygen (general anesthetic + medical gas)

ATC: N01AX63 (Nervous system | Anesthetics, general | Other general anesthetics)

The mixture of nitrous oxide and oxygen is used in medicine for anesthesia and analgesia, providing a safe and effective combination for pain reduction and relaxation. The additional oxygen prevents hypoxia, a risk associated with the use of nitrous oxide alone.

This mixture is administered via inhalation, usually during minor medical procedures or for pain relief during labor. It is important to administer it under the supervision of a specialist to ensure patient safety.

Side effects may include dizziness, nausea, vomiting, or a feeling of euphoria. In rare cases, prolonged use may lead to vitamin B12 deficiencies or other complications.

Patients should inform their doctor about any pre-existing conditions, such as lung diseases or anemia, to ensure the safe use of the nitrous oxide and oxygen mixture.

General data about ENTONOX 50% / 50%

  • Substance: nitrous oxide + oxygen
  • Date of last drug list: 01-04-2024
  • Commercial code: W56401003
  • Concentration: 50% / 50%
  • Pharmaceutical form: compressed medicinal gas
  • Quantity: 1
  • Product type: generic
  • Prescription restrictions: P-RF - Medicines prescription that is retained in the pharmacy (not renewable).

Marketing authorisation

  • Manufacturer: AGA GAS AB - SUEDIA
  • Holder: AGA AB - SUEDIA
  • Number: 5707/2013/01
  • Shelf life: 3 years