On a November morning in 2022, James Messenger opened wide and swallowed a capsule like no other.
Messenger was no stranger to taking pills.
He’d first experimented with prescription opioids as a teenager in Morgantown, West Virginia, battled addiction on-and-off since, and known more than 70 people who had fatally overdosed. So, when asked to test a new “smart pill” that could detect an overdose in progress and call for help, he didn’t hesitate to join the study.
“I’ve lost pretty much every good friend I’ve ever had to this,” said Mr. Messenger. “This pill could save a lot of lives.”
The new Vitals Monitoring capsule he tested is just one example in a growing effort to radically rethink what the humble pill is capable of.
As far back as 1965, scientists introduced the Heidelberg capsule, an electronic pill that measured acidity from within the gut. In 1994, the University of Buffalo coined the term “smart pill” with a device promising to ferry medicine to a precise spot in the intestine, “like the tiny ship in the film Fantastic Voyage.” And in 2001, the US Food and Drug Administration (FDA) approved the first video capsule endoscope, a miniature-camera-toting pill that enabled noninvasive imaging of the small intestine.
But now, nearly 300 iterations are in various stages of development, according to a 2022 analysis. Advances in materials, imaging, and artificial intelligence (AI) are helping address everything from sleep apnea to HIV/AIDS to gut disorders via real-time tracking and real-time help.
“These technologies could enable us to shift the paradigm from ‘Let’s wait until the patient comes to us and find out what happened’ to ‘Let’s see how things are changing in real time, intervene now, and personalize that intervention,’ ” said Peter Chai, MD, associate professor of emergency medicine and health technology researcher at Brigham and Women’s Hospital in Boston.
Tracking Vitals From the Inside Out
Already, overdose-reversal agents like naloxone are saving lives. But more than 60% of overdoses occur when no one is around to administer them.
“While we need to focus on treatment, we also need to come up with more acute ways to save individuals when treatment doesn’t work or relapse occurs,” said James J. Mahoney III, PhD, director of addictions research at the Rockefeller Neuroscience Institute at West Virginia University (WVU), Morgantown.
Enter Celero Systems, a Massachusetts-based digital health company that has developed a vitamin-sized capsule packed with tiny sensors, microprocessors, and a radio antenna. It can measure breathing, heart rate, and core temperature — all from deep within the gut.
Respiratory distress is a hallmark early sign of an overdose. But it can be hard to monitor from a distance, especially in populations without access to a charged smartwatch.
Dr. Mahoney imagines a day when patients at risk could be given a weekly pill like Celero’s. If their respiratory rate drops below a dangerous level, it could alert loved ones or, better yet, release an overdose-reversal drug.
“It’s early days,” stressed Dr. Mahoney, whose team has been conducting pilot tests of the pill. “But initial data look promising.”
For one study, published in the journal Device in November 2023, the research team administered an overdose of fentanyl to anesthetized pigs with the pill in their stomachs. The capsule was able to detect respiratory depression within a minute and alert researchers via their laptop in time to step in.
When they gave the pill to 10 volunteers undergoing sleep studies at WVU, they found it could detect respiration rate with an accuracy of 93% compared with external monitoring devices — a feature that could also help diagnose sleep apnea or chronic obstructive pulmonary disease without expensive, intrusive tests.
Accuracy for heart rate was nearly 97%.
In another yet-to-be published trial, Dr. Mahoney tested the device with 10 volunteers in a residential treatment center to determine how well it could be tolerated.
Among the participants was Mr. Messenger, who said the thought of being tracked didn’t bother him.
“It was simple — just like taking a multivitamin,” said Mr. Messenger, now 34, sober, and working as a peer recovery support specialist at a hospital in his hometown. “It could be a great way to keep people alive long enough for them to get their head wrapped around the idea of treatment.”