• Induction of General Anesthesia: Its most common use is to rapidly induce unconsciousness before maintaining anesthesia with inhaled agents (gas) for longer surgical procedures.
• Sole Anesthetic Agent for Short Procedures: It can be used as the sole anesthetic for brief, non-painful diagnostic interventions or minor surgical procedures lasting generally no longer than 20-25 minutes.
• Adjunct to Other Agents: It is often used in combination with other premedicants and muscle relaxants to achieve better muscle relaxation, improve hypnosis, and reduce the required dose of thiopental, which helps in a better quality of recovery.
• Control of Convulsive Disorders: It can be used as an adjunct for the control of seizures or convulsive disorders caused by various etiologies, including reactions to local anesthetics.
• Euthanasia: In cases of critical conditions with a hopeless prognosis, thiopental sodium is administered intravenously at high doses to provide a rapid and painless death. 

ADMINISTRATION

• Preparation: The drug is supplied as a yellowish powder and must be reconstituted with a sterile diluent, such as sterile water for injection or 0.9% sodium chloride solution, to create a 2.0% or 2.5% solution (20-25 mg/mL).
• Method: The solution is injected into a cannulated vein, and administration should be slow and carefully titrated to the patient’s response.
• Titration: Half of the calculated dose is typically given rapidly as a bolus, followed by additional smaller doses (e.g., quarter doses) over 20 to 30 seconds as needed to achieve the desired depth of anesthesia.
• Monitoring: The animal’s vital signs and reflexes must be closely monitored during administration to minimize the risk of respiratory depression, a common side effect.