I’ve actually brought up GBS on here a few times. I think there has even been some cases linked with Accutane.
https://www.washingtonpost.com/health/2021/07/12/johnson-and-johnson-warning/
The Food and Drug Administration is preparing to announce a new warning for the Johnson & Johnson coronavirus vaccine saying the shot has been linked to a serious but rare side effect — Guillain-Barré syndrome, in which the immune system attacks the nerves, according to four individuals familiar with the situation.