Ma'an could not independently verify the allegations.
Center director Badi' Al-Masri said the documents show that Israeli Prison Service staff in the Ramle prison prescribed unapproved, experimental drugs to sick prisoners to determine the drug's success rate.
"Instead of testing out new medicines on rats and animals, they are using detainees - and many are dying after their release from unknown causes," Al-Masri said.
He said one such case was that Foad Al-Shar’ from north the Gaza Strip who passed away from undetermined causes upon his release after being prescribed medicine in jail.