United Kingdom, Sept. 14 -- Mark Ronson feared he had suffered at stroke aged 20 because of his drug use.

The 50-year-old songwriter and record producer admits that he fell into substance abuse before finding fame as he recalled a terrifying experience he had after mixing drugs while out partying in New York during the 1990s.

Writing in his new memoir Night People, Mark recalled: "One night, when I was out late and already flying on E, I took a bump of coke. Within minutes, my chest tightened and my left arm went numb. Could I having a stroke? At 20?"

Ronson explained how his drug habit spiralled even further after producing his first record in 2001 and confessed that he was "lucky" to survive.

The star - who has produced songs for th...