Antipoisoning Act - Provides that no person shall: (1) make field use of any chemical toxicant on any Federal lands for the purpose of killing predatory animals; or (2) make field use of any chemical toxicant which causes any secondary poisoning effect for the purpose of killing other mammals, birds, or reptiles. Provides that any person convicted of any violation of this Act, or any regulation promulgated under this Act, shall be fined up to $10,000 or imprisoned for not more than one year or both.

Authorizes the appropriation of $400,000 to enforce the provisions of this part.

Authorizes the Secretary of the Interior to conduct a program of research which shall concern the control and conservation of predatory and depredating animals and the abatement of damage caused by such animals.

Authorizes the Secretary to provide, in the three fiscal years following enactment of this Act, financial assistance to any State which may annually propose to administer a program for the control of predatory animals. Authorizes to be appropriated for such financial assistance $3,000,000 in fiscal year 1976, $2,000,000 in fiscal year 1977, and $1,000,000 in fiscal year 1978.

Specifies poisons which may not be distributed under this Act for use in predator control programs.