What Forane is used for and how to use it
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Forane - Consumer Medicine Information

Manufacture: Baxter
Country: Canada
Condition: Local Anesthesia
Class: Local injectable anesthetics
Form: Liquid solution, Inhaler
Ingredients: isoflurane

(Isoflurane, USP)

About this medication

What the medication is used for

FORANE is used to put you under general anesthesia.

What it does

FORANE is used to induce and maintain anesthesia.

When it should not be used

FORANE should not be used if:

  • You have been told that you are allergic to isoflurane or other inhaled general anesthetics, or components of the container.
  • You have a history of liver inflammation (hepatitis) due to the use of an inhaled general anesthetic, or have experienced unexplained liver problems (for example jaundice with fever) after a previous use of an inhaled general anesthetic.
  • You or any member of your family has experienced a condition called malignant hyperthermia (a genetic disorder that causes rapid raise in body temperature) during an operation.

What the medicinal ingredient is

Isoflurane, USP

What the nonmedicinal ingredients are

The finished product is composed solely of the active ingredient, Isoflurane, USP.

What dosage forms it comes in

FORANE is available as liquid (100% v/v) supplied in 100 mL amber-colored bottles. The liquid is changed to gas in a vaporizer for inhalation. The vaporizer is designed to be used only with FORANE.

Warnings and precautions

Serious Warnings and Precautions
FORANE should only be administered by qualified individuals trained in general     anesthesia in an adequately equipped facility
FORANE may trigger a rise in blood potassium or body temperature. You may     experience stiff muscles, changes in blood pressure, rapid breathing, a bluish     colour to lips or fingers, rapid or irregular heart rate. Trained health care     professionals will take care of you if this happens.

You should talk to your anesthesia professional prior to your anesthesia if you are aware of any of the following conditions:

  • You have been told that you are allergic to isoflurane or other inhaled general anesthetics, or components of the container.
  • You have previously had general anesthesia, particularly if repeated over a short period of time.
  • A doctor has difficulty placing a tube down your throat to help you breathe.
  • You are pregnant (or may be pregnant). You are breast-feeding.
  • You or a member of your family suffers from malignant hyperthermia (a genetic disorder that causes rapid raise in body temperature).
  • You are suffering from any other illness, such as diabetes, severe headaches, cancer, problems with your nerves or muscles (especially muscular dystrophy), nausea, or vomiting.
  • You have or are at risk for developing Increased Intracranial Pressure (ICP). ICP is increased pressure inside the skull with general symptoms such as headache, vomiting without nausea, altered level of consciousness, back pain, and changes to your eyesight.
  • You have low blood pressure, heart, kidney, or liver problems.
  • You are taking prescription or non-prescription medications or herbal medicines.

Recovery of consciousness following FORANE administration generally occurs within minutes. Change in mood may persist for several days following administration.

Performance of activities requiring mental alertness or coordination such as operating a motor vehicle or hazardous machinery may be impaired for some time after general anesthesia. Do not drive a motor vehicle or operate hazardous machinery for at least 24 hours after having a general anesthetic.

Interactions with this medication

Serious Drug Interactions
— Tell your healthcare professional if you have muscular diseases (especially muscular dystrophy), and:
   —You are taking potassium, and/or
   —You have heart problems, especially irregular heart beats

Tell your doctor, nurse or pharmacist about all the medicines you take, including any drugs, vitamins, minerals, natural supplements or alternative medicines.

Drugs that may interact with FORANE include:

  • Other anesthetics, tranquillizers (e.g. benzodiazepines), narcotics (e.g. opioids), muscle relaxants (e.g. pancuronium), and nitrous oxide gas.
  • Calcium channel blockers (e.g. used to treat high blood pressure or seizures)
  • Beta blockers (e.g. used to treat high blood pressure and heart problems)
  • Monoamine Oxidase (MAO) inhibitors (e.g. used to treat depression, anxiety and migraine)
  • Isoniazid (a treatment for tuberculosis)
  • Indirect-acting sympathomimetics (amphetamines and their derivatives, psychostimulants, appetite suppressants, ephedrine and its derivatives)
  • Alcohol (chronic use before anesthesia)
  • St. John’s Wort

Proper use of this medication

Usual Dose

Your anesthesia provider will decide what dose of FORANE you will receive. The dose will vary depending on your age, weight, the type of anesthesia that you are having, and other factors.


Overdosage will be handled by the anesthesia provider.

In case of drug overdose (especially if you have accidentally come in contact with FORANE on your skin, in your eyes, by swallowing it or by breathing it in), contact a health care practitioner, hospital emergency department or regional Poison Control Centre immediately, even if there are no symptoms.

Side effects and what to do about them

Side effects include headache, cough, fatigue, mood changes, and nightmare.

After exposure to FORANE, you should contact your doctor or anesthesia provider if you have any of the following reactions:
CommonAgitation, Confusion
Difficulty Breathing
Increased Blood Sugar:
frequent urination, thirst, and hunger
Liver Disorders:
yellow color to skin and eyes, dark urine
Muscle Pain
Nausea, Vomiting
Nervous System Disorders:
confusion, nervousness, abnormal gait, dizziness,
drowsiness, intellectual function decreased
Slow, Rapid, or Irregular Heartbeat
UncommonHigh Blood Pressure:
headache, altered vision, nausea, vomiting
Low Blood Pressure:
light-headedness, fainting, especially when getting up
from a lying or sitting position
Malignant Hyperthermia:
sudden fever with stiffness, pain and weakness in your
Seizure or Fits
Heart Attack:
chest pain, shortness of breath, heart burn, sweating,
weakness, fatigue, light-headedness, nausea

This is not a complete list of side effects. For any unexpected effects while taking FORANE, contact your doctor, anesthesia provider, or pharmacist.

How to store it

FORANE should only be administered in an adequately equipped facility. FORANE must be kept out of reach and sight of children.

It is stored at room temperature (15° to 30°C).

Reporting suspected side effects

You can report any suspected adverse reactions associated with the use of health products to the Canada Vigilance Program by one of the following 3 ways:

  • Report online at www.healthcanada.gc.ca/medeffect
  • Call toll-free at 1-866-234-2345
  • Complete a Canada Vigilance Reporting Form and:
    • Fax toll-free to 1-866-678-6789, or
    • Mail to: Canada Vigilance Program
                     Health Canada
                     Postal Locator 0701E
                     Ottawa, ON K1A 0K9

    Postage paid labels, Canada Vigilance Reporting Forms and the adverse reaction reporting guidelines are available on the MedEffect™ Canada Web site at www.healthcanada.gc.ca/medeffect.

NOTE: Should you require information related to the management of side effects, contact your health professional. The Canada Vigilance Program does not provide medical advice.

More information

This document plus the full product monograph, prepared for health professionals can be obtained by contacting the sponsor, Baxter Corporation, at 1-888-719-9955.