Tranquilizers

Source:  IE

Context: The capture of the runaway tigress Zeenat in West Bengal highlights the delicate art of tranquilizing wild animals.

About Tranquilizers:

• What is a Tranquilizer?

• • A chemical agent used to immobilize animals by inducing sedation or unconsciousness through remote injection mechanisms like dart guns.

• Tranquilizers in the Past:

• • Rudimentary Methods:
    • Manual Capture: Early methods involved traps, pitfalls, and chasing animals with nets.
  • Early Chemical Tranquilizers:
    • Curare: Derived from tree bark, used by South American tribes for hunting. It paralyzed animals but didn’t sedate them.
    • Narcotic Bullets (1912): Carried morphine for painless kills but lacked precision in immobilization.
  • Mercy Bullets (1928):
    • Hypodermic needles with basic sedative chemicals, first introduced by Captain Barnett Harris.
    • Often unreliable and lethal in incorrect doses.

• Chemicals Used in Modern Tranquilizers:

• • Etorphine (M99): Strong opioid used for large mammals like elephants.
  • Xylazine: A sedative often combined with Ketamine for extended immobility.
  • Ketamine: Dissociative anesthesia; effective but prone to misuse.
  • Telazol: Ready-to-use combination of Tiletamine and Zolazepam, gaining popularity.

• How Tranquilizers Work:

• • Delivered via dart guns powered by compressed CO2 gas.
  • The dart injects the chemical subcutaneously or intramuscularly.
  • The tranquilizer acts on the central nervous system, inducing sedation or anesthesia

• Other Tranquilizers Commonly Used:

• • Neuromuscular Blockers (e.g., Curare): Earlier methods; high mortality rates and less humane.
  • Alpha-Adrenergic Tranquilizers: Safer, reversible sedatives like Xylazine.

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