Simple past tense and past participle of fictionalize.(verb)
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Use "fictionalized" in a sentence
"By coincidence, a story about Ayers and what he called his fictionalized memoirs appeared in The New York Times on the day of the attacks."
"A bubbly blond real-estate lawyer and former high-school classmate of the president's, Browning has self-published a novel, "Purposes of the Heart," which she describes as a fictionalized version of a long-running affair with Clinton (before she gave up finding a publisher, her agent, naturally, was the ubiquitous Goldberg)."
"Yesterday ... we went to Warwick and saw Michael Mann's Public Enemies (fictionalized from a non-fiction book by Bryan Burrough) which was actually quite good."