Man-Bat Serum

Man-Bat Serum is bat gland extract originally created by Doctor Robert Langstrom for the original purpose of amplifying a person's hearing capabilities to bat-like levels. However, when Langstrom injected the serum into his bloodstream the serum caused him to transform into a half-human/half-bat creature possessing enhanced senses, strength and flight capability.

While initially advantageous, the individual's human mind regresses the longer they stay transformed until they effectively become wild animals. An antidote to the serum is required to revert the individual back to their original form; with the first antidote being developed by Batman.

Trivia

 * Robert Langstrom often uses the serum to transform into Man-Bat in times of need and developed pill versions of the serum, which allowed him to carry the serum everywhere for faster transformations.