Intravenous Anaesthetics

Examples
Indications
Anaesthetic agents should only be used by specialists trained in their use.
Contraindications
Contraindications Cautions
Mechanism
Although the exact mechanism of action is not known, the GABAA receptor is thought to be a target for volatile anaesthetics - along with other inhibitory receptors. GABAA channel activation is inhibitory to synaptic transmission.

It is also thought that intravenous anaesthetics act to inhibit excitatory channels (e.g. those activated by glutamate).
Administration
Intravenous
Adverse Reactions
Rare more serious side effects can occur.
Interactions
Many interactions can occur particularly with muscle relaxants, anti-depressants/anti-psychotics and antihypertensive agents or any other CNS / CVS depressant.
Education
The risks of general anaesthesia should be explained to the patient.

Patients should not drive, drink alcohol or travel unaccompanied after day surgery procedures.
Pharmacokinetics
The drugs are injected intravenously and cause rapid anaesthesia when the brain is reached. The drug travels to well perfused tissues of the body first (e.g. heart, liver, kidney) but accumulates in body fat stores. This occurs when administration is over an extended period of time resulting in a prolonged release from fat stores when anaesthesia is stopped.