Players were reported to have taken the drug Driamyl, popularly known as Purple Hearts, and Benzendrine, before games for performance and recreationally at parties in the evening after games.
Dunlop, nearing the end of his playing career, said: “I cannot remember how they first came to be offered to us. But they were distributed in the dressing rooms. We didn’t have to take them but most of the players did.
"The tablets were mostly white but once or twice they were yellow. They were used through the 1961/62 season and the championship season which followed it.