The Answer to the Riddle is Me: A Memoir of Amnesia by David Stuart MacLean
After traveling to India on a Fulbright scholarship in 2002, young author MacLean found himself “waking up” on a train platform, with no memory of where he was. He learned of his name from his New Mexico-issued driver's license in his wallet. Amnesia had set in. MacLean began to hallucinate so severely that he was tied down in the neuropsychiatric institute to which he had been admitted. When his parents arrived from the States, they eventually learned that his condition was caused from a common drug called mefloquine, taken to combat malaria. From this point on, MacLean embarked on a disconcerting journey to recover his memories.
Review from Publishers Weekly:
MacLean fearlessly explores his journey to the edge of madness and his subsequent return to sanity in an unsettling, sometimes riotous, memoir. Destabilized by the brutal side effects of anti-malaria medication in India, MacLean hurtled into near-total amnesia. “I couldn’t even think of what name would have been on a passport if I had one or what foreign country I was currently in. This is when I panicked.” Committed to a mental hospital, where his allergic drug reaction is diagnosed, MacLean flails unsuccessfully for solid mental touchstones while making vivid, sometimes lovely observations about the swirl of life around him. After a rough return to his Ohio home, he adapts skills “used by any con man” to feign recognition and familiarity with his personal history. He breaks up with his girlfriend, nearly a stranger, and returns to India. The harsh effects of the drug Lariam are described soberly and clinically, but his account of returning to a foreign land proves especially disorienting, though an interlude of romantic misadventure offers some comic relief. He painfully reconstructs his breakdown, which was followed by a return to graduate school and a dreary routine of drinking, punctuated by troubling dreams that left him awake, alone, and bereft. The uneasy peace he attains grows stronger by the end of the book, when it’s oddly cheering to read “everyday crazy is something I can handle.”