Hawthorne Heights guitarist Casey Calvert died due to the acute combined effects of opiate, citalopram and clonazepam intoxication, according to his autopsy.
Calvert was found dead in the band's tour bus, outside of Washington D.C.'s 9:30 Club on November 24.
The autopsy listed Calvert's death as accidental, but it was a result of substance abuse. Both citalopram (also known by the brand name Celexa) and clonazepam (also known by the brand names Klonopin and Rivotril) are prescription drugs.
Citalopram is an antidepressant, while clonazepam used to treat seizure disorders and panic attacks.
Calvert had long suffered from depression and was prescribed Vicodin due to a root canal. However, it is uncertain why he was prescribed Vicodin, an opiate, when he was also taking clonazepam.
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