Insted of Shatrugan Sinha and Hema Malini, Sanjeev Kumar and Vidya Sinha were doing the roles, at that time. At that time, this film was called Samna, some scenes were shot, also a song was shot on Sanjeev & Vidya and this song was retained in Hirasaat, the changes were done due to Sanjeev Kumar demise. The director of hiraasat, Surendra Mohan in 1985 had started a big film with Sanjeev Kumar tittled 'Adaawat' but shelved when Sanjeev Kumar passed away.
Debut film of Poonam Dasgupta.
The song Sanjeev Kumar and Vidya Sinha had shot was retained in the film.It was shown as a part of a film which Mithun Chakaraborthy and Hema Malini got to watch in cinema hall.
Sanjeev Kumar was earlier to play Shatrughan Sinha's role.But passed away when he was shooting for the film in 1985.Director Surendra Mohan has dedicated the film to him.
Mithun's 4th major release in only 6 weeks time but still proved to be a hit at the box office.