Orgasmo (Italian for "orgasm") is a 1969 giallo film co-written and directed by Umberto Lenzi and starring Carroll Baker, Lou Castel, and Colette Descombes.

It follows a wealthy American socialite who finds herself preyed upon by two nefarious young siblings who indulge her in sex, drugs, and alcohol while she vacations at an Italian villa.

American socialite Catherine West arrives in Italy from New York to a flurry of journalists following the car accident death of her husband Robert, a Texas oil baron who left her his $200 million estate.

Catherine travels to London to visit with her late husband's relatives to discuss property she is bequeathing to them, but finds them to be abrasive and angry with her, believing she married Robert solely for his money.

Catherine loses consciousness due to a sedative fed to her by Eva, and awakens to find that the gun was loaded with blanks by the siblings, and that Peter was unharmed.

The two later bring her whiskey and a large number of barbiturates, along with a falsified letter stating Brian has died in a plane crash, with the hope that Catherine will voluntarily kill herself by overdosing.

After the reading of Catherine's last will and testament, Brian is met by a detective who notifies him that New York police discovered that the brakes in Robert's car were tampered with, causing his fatal road accident.

Brian momentarily fears their plot has been discovered, until the detective states that police believe Catherine caused the accident, as Robert had planned to divorce her.

[10]From contemporary reviews, the Monthly Film Bulletin wrote that "this high gloss melodrama rings enough changes on an old theme to keep one watching right up to the grisly retribution of the finale, even if the denouement is a trifle rushed".

[11] The review concluded that "it might have been even more enjoyable - on its own low camp level - if Umberto Lenzi had not been so determined to match style to subject, with the camera deliriously sliding in and out of focus as the tormented lady totters down the stairs and every scene shot from behind a bit of the furniture".

[11] Roger Ebert gave the film a negative review, stating that "only the haunting memory of Succubus prevents me from naming [Orgasmo] as the worst movie of the year".

The use of red lighting and off-kilter shots, while simple and inexpensive, are extremely effective in reproducing the state of being slowly overdosed on liquor and prescription pills."

[15] The X-rated U.S. cut of Paranoia was released on VHS in 1985, in pan and scan 4:3 aspect ratio, by Spotlite Video, a division of Republic Pictures Corporation.