The Wales star confirmed his retirement on Wednesday after failing to recover from a neck injury.
Warburton's announcement at the age of 29 is a huge blow for the sport, with the Lions flanker having suffered his fair share of injuries throughout his career.
Pichot admits the news is a warning for rugby players who have been given increased workloads and he admits discussions are taking place with the International Rugby Players Association.
He told reporters: "The red flags are there - Sam is one red flag - there was a tweet I saw about the number of injuries he has had and it was frightening.
"He had an outstanding career, but a number of injuries. We have to take care of the future generations."