Madhouse
- taona: 1981
- Firenena: Italy, United States of America
- Genre: Horror
- Studio: Overseas FilmGroup
- Keyword: birthday, psychopath, twin sister, animal attack, rottweiler, revenge, mental institution, rabid dog, video nasty, female teacher
- tale: Ovidio G. Assonitis
- Cast: Trish Everly, Allison Biggers, Michael MacRae, Dennis Robertson, Morgan Hart, Edith Ivey