According to the lawsuit, obtained by TMZ, Chris was a known "addiction-prone individual", yet the doctor took no steps to protect him.
His death was ruled a suicide.
Chris Cornell's widow Vicky Cornell has launched legal action against her late husband's doctor, Robert Koblin, alleging he and his Beverly Hills office "negligently and repeatedly" prescribed the late singer "dangerous mind-altering controlled substances" ahead of his death.
In the new lawsuit filed in Los Angeles Superior Court, Vicky and the two children she shared with Chris, 14-year-old daughter Toni and son Christopher Cornell, 12, alleged that the prescription drugs he was taking caused odd behavior just before his death, according to the Associated Press.
Musician Chris Cornell (left) and wife Vicky Karayiannis at the Golden Globe Awards. The documents also claim that Koblin did not examine the vocalist before prescribing the medication.
The lawsuit alleges Lorazepam increases the risk of suicide in addiction-prone individuals by impairing judgment and rational thinking.
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Lorazepam was found in Cornell's system at the time of his death, a toxicology report revealed.
The suit claims Dr. Koblin permitted non-physician staff to write hundreds of Lorazepam prescriptions, without showing any medical necessity or providing any monitoring. She said that there were no signs he might commit suicide leading up to his death, according to NBC.
They also state the "dangerous mind-altering controlled substances to Chris Cornell which impaired Mr. Cornell's cognition, clouded his judgment, and caused him to engage in risky impulsive behaviors that he was unable to control, costing him his life". His voice hailed from another galaxy found its way into the hearts of millions. "His music is a part of him that will always remain as vivid and pure, giving hope and light to those who find it", she wrote in September.
Vicky Cornell said in a statement when the report was released that she and others close to Cornell "noticed that he wasn't himself during his final hours and that something was very off".
Cornell's oldest daughter Toni, 18, is also named as a defendant, but the lawsuit emphasizes that she is a nominal defendant only, as required by law because she is heir to her father's estate.