
In 2012, Ken Maxwell was sailing in rough seas on the Atlantic when, while below deck, he was thrown headfirst into an overhead wooden beam and was briefly knocked unconscious.
Ken, an Army Veteran, had trained as an infantry officer at Fort Benning and later served in the Army Reserves. He had served as an operations officer at Fort Sam Houston, home of Brooke Army Medical Center. He knew what an injury looked like. This one didn't look like much at first.
But back home in the North Carolina mountains about five days after the incident, Ken was unable to walk without falling or speak coherent sentences. After a thorough medical examination, he was confirmed to have suffered a traumatic brain injury.
Over the next few months, a hot, searing, deep pain occurred behind one eye. Then his face began to droop. At first, his wife thought he was having a stroke. Alongside the pain came a constant runny nose and a watering eye, symptoms that looked like seasonal allergies were flaring up. His allergist placed him on the strongest allergy medications and shot regimen possible without benefit. Separately, his primary care provider was treating his pain as a mysterious and unknown headache. No one initially connected the two sets of symptoms to each other or to the fall.
It was the start of a search for answers that would take more than five years.
"This Is Not a Headache"
Out of options, in January 2018, his allergist sent him to an Ear, Nose, and Throat specialist for a CT scan. The ENT physician finally diagnosed Ken with cluster headache. His last words to Ken were, "Your life has dramatically changed with this diagnosis. You need to learn all you can. There is no cure." Like many people who hear the term for the first time, Ken only heard the word "headache." He walked out frustrated. What he was living with felt nothing like a headache.
What changed things was a physician assistant in his primary care doctor's practice who had previously worked at Diamond Headache Clinic in Chicago. He had seen cluster headache and understood the severity of this fairly rare diagnosis. Ken's primary care physician and the P.A. helped Ken research the disease and begin the years-long process of understanding the condition. Ken credits his primary care provider for knowing the limits of her own experience and her desire to help her patient.
She referred him to a cluster headache specialist in the neurology department at Wake Forest University, a teaching hospital two hours from home. That neurologist became his primary physician for the disease. But by May 2018, Ken's cluster headache had become chronic.
Looking for a Safer Path
Ken found community and information through Clusterbusters, a patient advocacy group for people living with cluster headache. Through the group, he followed a research project at VA Connecticut studying psilocybin as a headache treatment. He learned about members who were experimenting with psychedelics on their own, following the protocol that had benefited a large number of cluster headache patients. But he was reluctant because he had zero experience with psychedelics.
"It just wasn't in my wheelhouse. No judgment on anybody else."
He wasn't willing to risk his health on guesswork. So, when Dr. Emmanuelle Schindler, the VA Connecticut neurologist leading the trial, called to ask whether he would consider joining, the answer came easily. The appeal was the setting: a hospital, with a research team that would be right there if anything went wrong.
The screening covered his full medical history, a psychological profile, and his mental health. Ken also made sure his Wake Forest neurologist knew. He wasn't asking permission. He just wanted her in the loop. He was 100% on board with the trial and his neurologist was supportive.
He later learned that the research team had been urgently looking for one more participant. "It just so happened to be a marriage that worked out great," he said.
Nine Days
Ken was approved in early March 2020. He was making his airline reservations, nine days from leaving for Connecticut, when COVID suddenly shut the trial down.
"That was pretty devastating at the time," he said. "I had a lot of hope that maybe we would figure out what's going on here, and I wanted to see if it would help me."
Someone in His Corner
It could have ended there. Instead, through the months that followed, Dr. Schindler kept in touch with Ken, long before she knew when, or whether, the trial would resume.
"Dr. Schindler, to her credit, stayed in touch with me all during that time, which was kind of a lifeline, really."
In September 2020, she was the one who called with the news: the trial was reopening, and there was a place for him. Ken became the first participant admitted after COVID restrictions lifted, and he went through the entire trial masked, at the VA hospital.
Six months after the October 2020 trial, Ken was invited back by Dr. Schindler for a second round of treatments in May 2021.
Psilocybin eventually broke a streak of 415 consecutive days of these severe attacks. He now has 8–10 days per month with no attacks, and his attacks per day have dropped from 3.5–4.0 to about 1.2.
Why It Matters
Ken's story shows what Veterans face with headache disorders: symptoms that are easy to mistake for something else, years spent looking for the right diagnosis, and a hunger for treatments that actually work. It also shows the difference one researcher can make. A rigorous clinical trial gave Ken a safe way to try something new. But it was Dr. Schindler, staying in his corner when the trial couldn't move forward, who kept him in it.
Ken will share the stage with Dr. Schindler at NAVREF's State of the Science: New Frontiers in Veteran Migraine and Headache Research on November 5, 2026, in Arlington, Virginia.








