The follow prayer recited by Father Clement Machado is the Prayer of Exorcism written by Pope Leo XIII. This prayer may not be recited by laity as written.
If one is in need of deliverance, he may play this audio. Listening to the prayer as Fr. Machado recites it is still efficacious.
Note: the effect of this powerful prayer may be the feeling to want to vomit or may actually vomiting if one is oppressed or obsessed. This is normal and is usually a sign of demons being expelled. Other paranormal or physical phenomena may occur. If you have any concerns, please make an appointment.