Most of the patients Oliver Sacks made famous in his books experienced dramatic, often bittersweet trajectories. The post-encephalitic patients from “Awakenings” saw their miraculous recoveries fade as the drug that revived them became unpredictable and unmanageable. Patients from his other books, including autistic savant twins and a surgeon with Tourette syndrome, had quieter but no less complicated fates shaped by medical institutions and their own resilience.
The “Awakenings” Patients and L-DOPA
The patients at the center of Sacks’ most famous work were survivors of the encephalitis lethargica epidemic that swept the world between roughly 1917 and 1928. Often called “sleeping sickness,” the disease left many of its victims in frozen, catatonic states for decades. By the late 1960s, Sacks was working with about twenty of these patients at Beth Abraham Hospital in the Bronx, some of whom had been essentially locked inside their bodies for over 40 years. When he began administering L-DOPA, a drug originally developed for Parkinson’s disease, the results were stunning. Patients who hadn’t spoken or moved voluntarily in decades suddenly woke up.
The awakenings didn’t last. L-DOPA had dramatically different effects between patients and even within the same patient over time, and despite careful dose adjustments, the drug’s effects proved unpredictable. Most patients developed severe complications: involuntary movements, extreme mood swings, psychotic episodes, or a complete loss of response to the medication. The pattern was heartbreakingly consistent. A period of joyful reawakening gave way to instability, then often to a return of the frozen state, sometimes worse than before.
Leonard L.: The Patient Behind the Film
Leonard L. became the most publicly recognizable of the Awakenings patients, partly because Robert De Niro’s character in the 1990 film was based on him. When he first received L-DOPA, Leonard returned to what Sacks described as a happiness he “had not felt for thirty years.” He became animated, talkative, and engaged with the world. But within six weeks, he developed an exaggerated sensitivity to the drug. Even tiny doses triggered uncontrollable side effects, and the window of a workable dose essentially closed.
Leonard’s real life didn’t fully match Sacks’ portrayal. In the book, Sacks characterized Leonard as a solitary, bookish figure even before his illness, someone with few friends who avoided typical social activities. But in an autobiography Leonard himself wrote after taking L-DOPA, he described his pre-illness years very differently. He wrote about spending all his time with two best friends: “We were inseparable.” This discrepancy became part of a broader reckoning with Sacks’ methods. In his private journals, Sacks acknowledged that some details in his case studies were “pure fabrications,” though he maintained he had preserved “the real and full presence of the patients themselves.” Leonard ultimately passed away in 2017 from complications related to Parkinson’s disease, a condition commonly linked to encephalitis lethargica survivors.
Rose R., Miron V., and the Others
Each Awakenings patient followed a distinct path, which made the experience so difficult for Sacks and the hospital staff to manage. Rose R. was struck by sleeping sickness at age 21 and awoke in 1969 to discover that the world of 1926 she remembered had vanished. She remained psychologically rooted in the 1920s. The gap of more than four decades seemed beyond her ability to process, and she eventually stopped responding to L-DOPA entirely.
Miron V. offered one of the few hopeful long-term stories. After an initially excellent response to L-DOPA, he became violently unstable. But when he resumed work at a cobbler’s workshop, his mood stabilized. He became cheerful and continued to do well on the medication. His case suggested that purposeful activity and a sense of identity could make the difference between a sustainable awakening and a collapse back into instability. Still, outcomes like Miron’s were the exception. Most of the original twenty patients at Beth Abraham eventually lost their battle with the drug’s side effects or the progression of their underlying disease. By the time Sacks wrote the final edition of “Awakenings” in the 1990s, only a handful were still alive.
The Savant Twins: John and Michael
In “The Man Who Mistook His Wife for a Hat,” Sacks described John and Michael, twenty-six-year-old autistic identical twins who could perform extraordinary feats of mental calculation. They could name the day of the week for any date spanning tens of thousands of years, and they exchanged enormous prime numbers with each other for pleasure, sitting together in a kind of private mathematical communion. The exchanges clearly brought them deep satisfaction.
Their story took a grim turn. In 1977, their physicians decided to separate the twins, believing their intense private communication was holding back their social development. Once apart, both lost their remarkable numerical abilities. They were placed in halfway houses and given simple jobs. The separation was meant to help them function more independently in the world, but it destroyed the shared inner life that had given them joy. Whether the trade-off was worth it remains one of the most uncomfortable questions raised by Sacks’ writing.
The Surgeon With Tourette Syndrome
Not all of Sacks’ patients had tragic endings. In “An Anthropologist on Mars,” Sacks profiled a surgeon he called Dr. Carl Bennett (a pseudonym), who had Tourette syndrome. Bennett practiced surgery in a small town in British Columbia, and Sacks visited him to observe how someone with involuntary tics and movements could perform delicate operations. The answer turned out to be surprisingly straightforward. Bennett’s tics disappeared when he operated. His entire psychological and neurological organization aligned with the task, becoming focused, steady, and, as Sacks put it, “un-Tourettic.”
Bennett continued practicing medicine successfully. At one point he took a year off from his surgical practice to study geography and geology at the University of Victoria, reflecting a wide-ranging intellectual curiosity. His case became one of Sacks’ most compelling arguments that neurological conditions don’t define a person’s capabilities, and that the brain can organize itself around purposeful work in ways that override its own disruptions.
The Question of Accuracy
As the years passed, questions emerged about how faithfully Sacks had represented his patients. A 2025 investigation in The New Yorker examined his private journals and found that Sacks himself grappled with guilt over his methods. He wrote that “a sense of hideous criminality” clung to his work, that he had given his patients “powers (starting with powers of speech) which they do not have.” He recognized that some details were fabricated, even as he tried to convince himself the embellishments came from a genuine place rather than a desire for fame.
In the preface to “Awakenings,” Sacks acknowledged changing circumstantial details to protect privacy but insisted he preserved what was essential. The gap between Leonard L.’s actual autobiography and Sacks’ version of his pre-illness life suggests the changes sometimes went beyond disguising identities. Sacks was a gifted storyteller, and the narrative demands of his writing occasionally won out over strict clinical accuracy. For the patients who survived long enough to read their own stories, this created a strange experience: seeing a version of yourself made vivid and sympathetic for millions of readers, but not entirely recognizable as you.