Major drugmakers are using artificial intelligence to find patients for clinical trials quickly, or to reduce the number of people needed to test medicines, both accelerating drug development and potentially saving millions of dollars.

Human studies are the most expensive and time-consuming part of drug development as it can take years to recruit patients and trial new medicines in a process that can cost over a billion dollars from the discovery of a drug to the finishing line.

Pharmaceutical companies have been experimenting with AI for years, hoping machines can discover the next blockbuster drug. A few compounds picked by AI are now in development, but those bets will take years to play out.