Night of the Lepus (1972) is about an experimental hormonal drug which is tested on rabbits only to cause a horrible result for blood.
The Blob (1988) is about a mysterious goo ball that crashes to earth and figures out that it likes the taste of the locals.
Shivers (1975) follows a doctor who creates a parasite through unethical experiments that helps humans return to their animal-like instincts.
Night of the Comet (1984) follows Regina and her young sister, Sam who fight for survival in a post-apocalyptic world and find survivors.
Death Warmed Up (1984) follows Michael who seeks revenge on a doctor who had surgically injected a serum causing him to kill his parents.