The first trailer for Netflix horror series Ratched has left viewers sickened by its evil scenes.

The new drama comes from Glee and American Horror Story creator Ryan Murphy and stars Golden Globe winner Sarah Paulson as one of cinema's most iconic characters.

Ratched is a spin-off and prequel to the classic novel and film One Flew Over the Cuckoo's Nest, focusing on the evil and abusive Nurse Ratched.

The character was played by Louise Fletcher in the film and won an Oscar for her portrayal of the ruthless administrator of the mental institution.

The series will tell the origin story of Nurse Mildred Ratched as she comes fresh from the Second World War and begins her work as a nurse in the mental health system.

However, if she looked bad in the film, here she is downright murderous as she commits bloody acts to ensure her climb to the top.

Netflix's Ratched trailer leaves fans sickened by terrifying and torturous scenes

The trailer shows her clashing with Nurse Betsy Bucket (Judy Davis) and Dr. Richard Hanover (Jon Jon Briones), whilst also meeting characters such as eccentric Lenore Osgood ( Sharon Stone ) and friendly Gwendolyn Briggs ( Cynthia Nixon ).

Yet, it is the tortuous and bloody content of the scenes in the mental institution - including nail-biting lobotomy scenes - that has gotten Netflix fans talking on social media.

One Netflix fan wrote on Twitter : "am I going to have nightmares? Yes. The Do I care? No."

Sarah Paulson plays the evil Nurse Ratched in the series
The horrifying scenes will terrify fans

Another person added: "I wonder if Sarah Paulson can sleep through the night after all the scary movies she starred in. Or just because of that?"

A different Twitter user commented: "NOT THE HAMMER OH MY F****N AHHHHH".

Meanwhile, another frightened viewer tweeted: "Omg don’t do that I’m actually so afraid, I don’t need more of this s**t. Jzkakzkskskksjsjsjsbsja but i want the show right now ndkizuaudjkskdkz".

The stylish series already seems to have a following after one trailer

Netflix - Best series to binge-watch

Elsewhere, another person wrote: "suddenly im sick and need a nurse".

Finally, one future viewer concluded on Twitter: This. Looks. Terrifying. My heart is pounding just watching the trailer!!! I'm ready... Kudos to @MsSarahPaulson & the #RatchedNetflix team #Ratched#SheIsComing ".

We are so ready for this!

Ratched season 1 is released on Netflix on September 18, 2020.