Just to be clear, I hope everyone is being sarcastic. Getting your fish drunk is a very stupid and costly mistake. But hey it's your money and conscience so go ahead.
"Clove oil (eugenol) is available at any drug store and is sold as a toothache remedy. It has been used for years as a fish anesthetic for surgeries and tagging procedures. Clove oil will put a fish to sleep and ensure it feels no pain. However the fish can wake up from this sleep if removed from the clove bath. The last step of adding the vodka will ensure the fish expires. "
Expires=death