Reminds me of this episode of The Outer Limits https://www.imdb.com/title/tt0667978/ https://www.imdb.com/title/tt0667978/ > A desperate dying man injects hims

Reminds me of this episode of The Outer Limits https://www.imdb.com/title/tt0667978/ https://www.imdb.com/title/tt0667978/ > A desperate dying man injects himself with experimental nanobots that can supposedly cure anything. It works, but then his body starts to hideously mutate. He asks his soon-to-be brother-in-law, who invented the nanobots, for help.