The postmortem report by Osmania Hospital forensic department, however, said that Charan died of liver failure due to alcoholism.
36-year-old Charan, whose full name was Charan Reddy, married Supriya, grand daughter of Akkeneni Nageswara Rao. The couple filed for divorce last year.
Ishtam was produced by Ramoji Rao on Usha Kiran movies banner and was directed by Vikram Kumar & Raj Kumar.
Well-known actress Shriya made her debut in this film as heroine. Though Charan could not make it big later, Shriya went to become a leading heroine in South Indian film industry.
Ishtam did not do too well at the box office.