Ryan Swain has spoken out about the near-fatal allergic reaction to ADHD medication that left him flatlining in an operating theatre on New Year’s Eve 2010.
Swain, 34, from Malton, North Yorkshire, UK, received his ADHD diagnosis that same year after a nine-month wait and three sessions with specialists. He was prescribed Concerta, a methylphenidate-based drug, but the effects were immediate and devastating.
“I didn’t really know how my anatomy was going to react to this medication, and within the first few months on the Concerta I just became an absolute zombie, a complete shell of myself,” Swain told Talk to the Press.
His medical team then switched him to atomoxetine, a compound that works in the brain rather than the central nervous system. At first, the change seemed promising.
“They then put me on atomoxetine,” Swain recalled. “It worked very well at first because it did not take too much of my personality away.”
But the improvement masked a dangerous toll on his body. Swain said he “did not realise how much of an impact it was having on my vital organs.”
The crisis struck on December 31, 2010. Swain collapsed at home and woke in a hospital operating theatre, his father at his side after an emergency blue-light transport.
“I’d been blue-lighted to hospital, my dad beside me, and basically flatlined for a few seconds, because I’d had a violent allergic reaction,” Swain said. “The doctor said he’s never ever seen anything like it in his life.”
The aftermath was grueling. “Not only did I flat line and nearly fall into a coma but when I was resuscitated, I was projectile vomiting for hours and hours and hours to a point where I was actually rupturing my stomach lining and throwing up blood,” Swain told Talk to the Press.
He quit the medication immediately. “I felt like I had been led down a garden path to take this medication which had nearly killed me,” he said.
The psychological scars proved as persistent as the physical ones. “I have since struggled with taking general medication after my reaction,” Swain explained. “It created a real anxiety and lack of trust around taking anything without first understanding why I need it.”
Despite his ordeal, Swain has been careful to clarify his position. He is not “anti-medication,” he said, though the experience pushed him toward homeopathic methods for managing his symptoms. Music and skateboarding became central tools, alongside organizational strategies that help with the impulsivity, difficulty planning ahead, and executive-function challenges that characterize his ADHD.
Swain now channels his experience into advocacy through You, Me & ADHD, a free service he founded to support young people and families exploring alternatives to medication for managing the condition.
The Mayo Clinic notes that atomoxetine carries risks of serious allergic reactions including anaphylaxis and angioneurotic edema, which can be life-threatening and require immediate medical attention. Concerta lists similar effects plus chest pains among its potential adverse reactions.