Kesha's Mom Sues Dr. Luke He Gave Me PTSD


Kesha's mom has countersued Dr. Luke ... claiming he tormented and abused her by allegedly date raping her daughter.

Pebe Sebert claims in her legal docs -- obtained by TMZ -- Luke did indeed rape Kesha in a way "as not to be tolerated in a civilized society." She claims she now suffers emotional distress and post-traumatic stress disorder as a result. 

Pebe is largely restating the claims Kesha has made -- that Dr. Luke gave her a date rape drug and raped her. But she also adds new detail, claiming Luke would brag about taking girls out on a first date, get them drunk and then "f*** them in the ass."

 Pebe also claims Luke dealt drugs to entertainers -- which she says is how he acquired the name "Dr." -- during his 10-year run as a guitarist on "SNL."

Luke has denied the claims made by Kesha and Pebe, saying it's all a ploy for Kesha to get out of her contract with him. 

As for the PTSD ... she says her blood pressure has spiked to 265/180 and during a therapy session she would become hysterical and convulse to the point where she had to be medicated.