Actress Demi Moore was convulsing and "burning up" after taking an unidentified drug when emergency services were called earlier this week, according to the 911 call released Friday.

During the 10-minute call friends tell the 911 operator that the 49-year-old, who split from her younger husband Ashton Kutcher in November after his alleged infidelity, has "been having some issues lately."

"She's convulsing so we're holding her down," said one of three people who take turns to speak to the operator, repeatedly asking him to send an ambulance urgently to her Beverly Hills home.

"Demi, can you hear me?" a woman says at one point, apparently talking to the star. "Yes, she's squeezing hands," she then tells the operator, but adds: "She can't speak."

The 911 call was released, and posted on the TMZ celebrity news website three days after Moore's spokesman said she was suffering from "exhaustion," although TMZ said she had been rushed to hospital for drug abuse.

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