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Sevoflurane 100% inhalation Vapour liquid – patient leaflet, side effects, dosage

Status:
Prescription only (POM) Key facts
Medicine strength:
100% (1 ml/ml)
Contains active substance:

Patient leaflet - Sevoflurane 100% inhalation Vapour liquid

1. What sevoflurane 100% inhalation vapour, liquid is and what it is used for

The active ingredient in Sevoflurane 100% Inhalation Vapour, liquid is sevoflurane, which is a general anaesthetic used for surgical operations and other procedures.

It is an inhaled anaesthetic that is given to you as a vapour for you to breathe in.

It causes you to fall into a deep sleep (induction of anaesthesia). It also maintains a deep, painless sleep during which you can undergo surgery (maintenance of anaesthesia). You must talk to a doctor if you do not feel better or if you feel worse.

2. What you need to know before you are given sevoflurane 100% inhalation vapour, liquid

Sevoflurane should be administered only by healthcare professionals appropriately trained in the administration of general anaesthesia under the supervision of or by an anaesthetist.

You should not be given Sevoflurane 100% Inhalation Vapour, liquid if any of the following applies to you, please tell your doctor if:

  • There are medical reasons why you should not be given a general anaesthetic.
  • You have been told previously that you should not receive general anaesthesia.

    • You are hypersensitive (or allergy) to sevoflurane or other similar anaesthetic.
    • You, or anyone in your family, are susceptible to a condition called malignant hyperthermia (rapid rise in body temperature and severe muscle contractions) during anaesthesia.
    • You have liver problems or if you have previously had general anaesthetics, particularly if repeated over a short period of time. Some anaesthetics can occasionally cause problems in the liver, which can cause yellowing of the skin and eyes (jaundice). - You have ever had QT prolongation (prolongation of a specific time interval in an ECG) or torsade de pointes (a specific type of heart rhythm), which may also be

      • shortness of breath
      • reduced liver function or hepatitis (inflamed liver), characterised by e.g. loss of appetite, fever, nausea, vomiting, abdominal discomfort, jaundice and dark urine.
      • dangerously raised body temperature
      • chest discomfort
      • a rise in the pressure inside the skull
      • irregular heart beat or palpitations
      • inflammation of the pancreas
      • Increases in blood potassium levels as detected by a blood sample test
      • muscle stiffness

        • inflammation of the kidneys (symptoms may include fever, confusion or sleepiness, rash, swelling, more or less urine than normal, and blood in the urine) - swelling

Sometimes seizures (fits) are seen. These can occur when receiving Sevoflurane 100% Inhalation Vapour, liquid, or up to a day later during recovery. They occur mostly in children and young adults.

In children with Down Syndrome who receive sevoflurane, a slowing of the heart rate can occur. Children with Pompe’s disease, a disease that they are born with, may have irregular heart rhythm during anaesthesia with sevoflurane.

Levels of fluoride in the blood may be raised slightly during and immediately after anaesthesia, but these levels are not thought to be harmful and soon return to normal.

If any of the side effects get serious, or if you notice any side effects not listed in the leaflet, please tell your doctor or pharmacist.

If you notice any change in the way you feel after receiving sevoflurane, please inform your doctor or pharmacist. Some side effects may need treatment.

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report you it is safe. Receiving an anaesthetic may influence your alertness for several days. This may affect your ability to carry out tasks that require mental alertness. Ask your anaesthetist when it will be safe for you to drive and use machines again.

3. How sevoflurane 100% inhalation vapour, liquid will be given

Sevoflurane 100% Inhalation Vapour, liquid will be given by a trained anaesthetist in a surgery or hospital. The anaesthetist will decide how much sevoflurane you need and when it is to be given. The dose will vary according to your age, weight, the type of surgery you need, and other medicines given to you during surgery. - Decongestants (ephedrine): used as a decongestant and commonly found in cough and cold medicines - Non-selective monoamine oxidase (MAO) inhibitors (a type of antidepressants)

  • Calcium antagonists
  • Verapamil: This is a heart medicine, and it is given to treat a high blood pressure or when you suffer from an irregular heart beat.
  • Tranquillisers (benzodiazepines e.g. diazepam, lorazepam): These are sedative medicines, which have a calming effect. They are used when you feel nervous for instance before your surgery. - Strong painkillers such as morphine or codeine - Muscle relaxants (Non-depolarising e.g. vecuronium, pancuronium, atracurium and depolarising e.g.

    Sevoflurane 100% Inhalation Vapour, liquid is changed to vapour (gas) in a vaporiser. You will breathe it in as a vapour.

    It may be used to put you to sleep before your operation or, if you are put to sleep with an injection, it may be used to maintain anaesthesia during the operation.

    Once the anaesthetist stops you from inhaling sevoflurane, you will wake up within a few minutes. If you have any further questions on the use of this product, ask your anaesthetist, doctor or nurse. If you receive more Sevoflurane 100% Inhalation Vapour, liquid than you should Sevoflurane 100% Inhalation Vapour, liquid will be given to you by a healthcare professional and it is not likely that you will succinylcholine): These medicines are used during general anaesthesia to relax your muscles. - Isoniazid, used to treat tuberculosis (TB) - Isoprenaline

    • Other anaesthetics, e.g. nitrous oxide: This is a medicine used during general anaesthesia that will cause you to sleep and will ease your pain, propofol, opioids (e.g. alfentanil and sufentanil: These medicines are strong pain killers and are often used during general anaesthesia as sevoflurane may affect the way they work if they are given at the same time.

Please tell your doctor or nurse if you are taking or have recently taken any other medicines, including medicines obtained without a prescription. This also

receive too much Sevoflurane 100% Inhalation Vapour, liquid. If you are given too much Sevoflurane 100% Inhalation Vapour, liquid, your anaesthetist will take any necessary measures.

4. Possible side effects

Like all medicines, Sevoflurane 100% Inhalation Vapour, liquid can cause side effects, although not everybody gets them. It is however, important to consult your ward doctor, nurse or anaesthetist if you are feeling unwell.

Serious rare side effects (can be life-threatening): - Anaphylaxis and anaphylactoid reactions (see not known side effects section for more information). applies to herbal medicinal products, vitamins and minerals.

Sevoflurane 100% Inhalation Vapour, liquid with food and drink

Sevoflurane 100% Inhalation Vapour, liquid is a medicine to make and keep you asleep so you can undergo surgery. You should ask your doctor, surgeon or anaesthetist when and what you can eat or drink after you wake up.

Pregnancy and breast feeding

Tell your doctor or anaesthetist if you are pregnant or think you may be pregnant or are breast feeding. It is not known whether sevoflurane or its by-products are transferred into human milk. It is advisable to stop breast-feeding for 48 hours after sevoflurane

The following side effects are serious and you may need immediate medical attention. Hospital staff will monitor you throughout your anaesthesia and will give immediate assistance when necessary.

Tell the doctor or nurse immediately if you have any of the following:

  • Allergic reactions, which can be severe, with swelling of the face, tongue and throat and difficulty breathing. - Malignant hyperthermia (very high temperature), which may require intensive care and may be fatal. This condition may run in families.
  • Increased potassium levels in the blood (hyperkalaemia), which may result in abnormal heart rhythms and can be fatal in children during the post-

    OPEN

    UK Only

UK Only Store below 25 °C. Do not refrigerate. Keep the bottle tightly closed. Store upright Keep out of the sight and reach of children. Read the package leaflet before use. Inhalation use.

Contains fluorinated greenhouse gases. Each container contains 380 g of Sevoflurane corresponding to 0.0741 tone CO2 equivalent (global warming potential GWP = 195). PL37071/0023

MA Holder :

Piramal Critical Care Limited,

Suite 4, Ground Floor

Heathrow Boulevard - East Wing,

280 Bath Road, West Drayton,

UB7 0DQ, United Kingdom

Store below 25 °C. Do not refrigerate. Keep the bottle tightly closed. Store upright

Keep out of the sight and reach of children. Read the package leaflet before use. Inhalation use.

Contains fluorinated greenhouse gases. Each container contains 380 g of Sevoflurane corresponding to 0.0741 tone CO2 equivalent (global warming potential GWP = 195). PL37071/0023

MA Holder :

Piramal Critical Care Limited,

Suite 4, Ground Floor

Heathrow Boulevard - East Wing,

280 Bath Road, West Drayton,

UB7 0DQ, United Kingdom side effects directly via Yellow Card Scheme at: www.mhra.gov.uk/yellowcard. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store sevoflurane 100% inhalation vapour, liquid

Keep out of the sight and reach of children. Do not use Sevoflurane 100% Inhalation Vapour, liquid after the expiry date (MM-YYYY) which is stated on both the bottle label and carton. The expiry date refers to the last day of that month. The abbreviation, EXP is used for expiry date on the labels.

Store below 25 °C. Do not refrigerate. Keep the bottle tightly closed. Store upright.

6. Contents of the pack and other information

What Sevoflurane 100% Inhalation Vapour, liquid contains:

Sevoflurane 100% Inhalation Vapour, liquid contains 100% of the active ingredient sevoflurane. There are no other ingredients.

This medicine contains fluorinated greenhouse gases. Each container contains 380 g of Sevoflurane corresponding to 0.0741 tone CO2 equivalent (global warming potential GWP = 195).

What Sevoflurane 100% Inhalation Vapour, liquid looks like and contents of the pack:

associated with QT prolongation. Sevoflurane has sometimes been known to cause these. - You are prone to or at risk for seizures (fits). - You have a mitochondrial disease.

Warnings and precautions

Talk to your doctor before taking Sevoflurane 100% Inhalation Vapour, liquid if:

  • You have previously had general anaesthetics, particularly if repeated over a short period of time. You may have an increased risk of liver problems - You are suffering from any illness, other than those connected with your operation, particularly any kidney or heart problems, low blood pressure, severe operative phase. This has been seen in patients with neuromuscular disease, particularly Duchenne muscular dystrophy.

If you experience any of the following, tell your doctor or nurse:

Very common side effects (may affect more than 1 in 10 people)

  • restlessness (agitation) in children
  • slow heart rate (bradycardia)
  • low blood pressure
  • coughing
  • nausea and vomiting.

    headaches, nausea or vomiting or Pompe’s disease in children (a metabolic disorder). Sevoflurane may produce abnormal heart rhythms, which may be severe in some cases

    • You have a certain type of muscle weakness (myasthenia gravis) because people with this disease are very sensitive to medicinal products that suppress breathing.
    • You have a coronary artery disease
    • You are hypovolaemic (reduced blood volume) or weak
    • You suffer from a neuromuscular disease, particularly Duchenne muscular dystrophy

Common side effects (may affect up to 1 in 10 people)

  • headache
  • drowsiness
  • dizziness
  • fast heart rate
  • increased blood pressure
  • breathing disorder
  • airway obstruction
  • slow and shallow breathing
  • throat spasm, respiratory problems
  • mouth watering
  • hypothermia, chills
  • fever

    • You have raised pressure in the skull (intracranial pressure), such as from a head inUury or brain tumour
    • You have seizures or seizure disorders (fits), as sevoflurane may increase the risk of seizures. - You are pregnant or breastfeeding.

Children

  • you have Down syndrome

If any of the above apply to you check with your doctor, nurse or pharmacist. You may need to be checked carefully and your treatment may be changed. The following effects may occur during or after Sevoflurane 100% Inhalation Vapour administration: - abnormal blood sugar level, liver function test or white blood cell counts i.e. increased susceptibility to infections

  • increased blood fluoride.

Uncommon side effects (may affect up to 1 to 100 people)

  • confusion
  • abnormal heart rhythm and abnormal heart beats - AV blockade (a disorder of the electrical conduction of the heart)
  • stopping breathing, low oxygen levels, fluid on the lungs
  • retention of urine, glucose in the urine

    • During the period in which you are anesthetized (induction phase), sevoflurane, as well as medicinal products that resemble it (halogenated anesthetics), may induce coughing. This must be taken into account.
    • As with other anesthetics, minor mood changes may occur for a number of days after sevoflurane administration.
    • Young children under the age of six are more likely to experience acute confusion (delirium) when waking up from anesthesia. In addition, children under the age of six are more likely to experience agitation/anxiety when waking up from anesthesia. - In sensitive patients, anesthetics given by inhalation (inhalation anesthetics) may cause an increased - increased blood creatinine levels (an indicator of poor kidney function), as detected by a blood sample test.

Other side effects [frequency not known (frequency cannot be estimated from available data)]

  • asthma
  • allergic reactions e.g.:
  • rash
  • redness of the skin
  • urticaria (hives)
  • itching
  • swollen eyelids, breathing difficulties

    metabolic (hypermetabolic) state of the skeletal muscles. This leads to high oxygen requirements of your muscles due to too high levels of CO2 in the blood (hypercapnia). In that case you may experience muscle stiffness (muscle rigidity), increased heart rate (tachycardia), increased breathing (tachypnea), blue discoloration of the lips, tongue, skin, and mucous membranes (cyanosis), heart rhythm disturbances (arrhythmia), and/or unstable blood pressure.

    • In rare cases, the use of inhaled anesthetics (inhaled anesthetics) has been associated with an increased potassium level in the blood fluid (increase in serum potassium levels) that have led to heart rhythm - anaphylaxis and anaphylactoid reactions. These allergic reactions occur quickly and can be life- threatening. Symptoms of anaphylaxis include: - malignant hyperthermia
    • angioedema (swelling of the skin of the face, limbs, lips, tongue or throat)
    • breathing difficulties
    • low blood pressure
    • urticaria (hives)
    • epilepsy-like fits
    • sudden twitching movements
    • cardiac arrest
    • cramping of the airways
    • difficulty in breathing or wheezing
    • breath holding

disturbances (arrhythmias) and death in children after surgery.

  • Sevoflurane may cause respiratory depression, which may be increased by narcotic premedication or other medicinal products that cause respiratory depression. Respiration should be monitored and if necessary be supported.

Other medicines and Sevoflurane 100% Inhalation Vapour, liquid

Tell your doctor if you are taking or have recently taken any of the following:

The medicines or active substances contained in the medicines listed below may influence each other’s effect when used together with Sevoflurane 100%

administration and discard any milk that is produced during this period. You should not receive sevoflurane 100% Inhalation Vapour, liquid if you are pregnant unless it is essential.

The use of sevoflurane for anesthesia during a C-section is safe for you as well as for your baby. The safety of sevoflurane during contractions and natural birth has not been demonstrated. Like other anesthetics, sevoflurane may cause reduced respiration in neonates. Your doctor will determine whether you may use sevoflurane.

Driving and using machines

Sevoflurane 100% Inhalation Vapour, liquid severely influences your ability to drive and operate tools. Do not drive or operate tools or machines until your doctor tells Inhalation Vapour, liquid. Some of these medicines are given to you during your surgery by your anaesthetist, as indicated in the description.

  • Amphetamines (stimulants): used to treat attention-deficit hyperactivity disorder (ADHD) or narcolepsy) - Medicines that affect the heart such as adrenaline or epinephrine
  • Beta blockers (e.g. atenolol, propranolol): These are heart medicines often given to treat a high blood pressure.
  • Alcohol
  • Barbiturates (depressant)
  • St. John’s Wort (an herbal remedy used to help with depression)

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 37071/0023

MHRA data as of 13 October 2026

What the sections and the side effect frequencies mean: How to read a patient leaflet

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Sevoflurane 100% inhalation Vapour liquid

What these facts mean

Prescription needed?? Yes, prescription-only medicine (POM)
Active substance? Sevoflurane
Strength? 100% (1 ml/ml)
Pharmaceutical form? Inhalation vapour liquid
Clear, colourless, volatile liquid
How is it taken? Inhalation
Excipients? None.
Pack sizes 250 ml
Is it available?? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life? 5 years for amber glass bottles with screw cap.
3 years for amber glass bottles with an integrated adaptor, multi-component closure.
Storage Store below 25 °C. Do not refrigerate. Keep the bottle tightly closed. Store upright.
Drug group (ATC)?
  1. N Nervous system drugs
    1. N01 Anesthetics
      1. N01A Anesthetics, general
        1. N01AB Halogenated hydrocarbons, general anesthetics
          1. N01AB08 sevoflurane
Marketing authorisation? PL 37071/0023 (first authorised 13 February 2015)
Marketing authorisation holder? Suite 4, Ground Floor
Codes? GTIN 5056162501348 · BNF 15010200

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 11.1.0 of 9 November 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.