Rajesh Khanna tying a handkerchief on his forehead had become a style statement.
The film Dushman was originally titled "Zanjeer". But the producers were not happy with the title. They finally selected "Dushman" and gifted the title " Zanjeer" to Prakash Mehra.
The producer of Dushmun,Premji,paid Meena Kumari's bill at the St.Elizabeth Nursing home. This was in her last days. Mehmood said that it was money owed to her for the film.
First choice for the role was Dharmendra. But the producer could not afford his price. Rajesh Khanna was signed pre Aradhana for a smaller price.
"That Raw" song by Torae sampled the Title music of Dushman.