The general definition of exorcism states that expulsion is usually achieved by the utterance of an adoration in which the name God is invoked and his aid sought.
This definition generally describes the process by which those who are sick due to demon possession (Jinn according to Islam) are treated, except according to Islamic law only the name of Allah may be invoked.
Cure is usually effected by the use of religious formulas and prayers.
According to Islamic law, treatment by exorcism is divided into two categories: prohibited techniques and permissible techniques.
Prohibited techniques are those which include statements or acts which are contrary to Islamic law.
Permissible methods are those which conform with the guidelines found in the sources of Islamic jurisprudence.
As a result, Muslim scholars have prohibited the use of incantation whose meanings are not understandable, because there is a possibility of shirk being involved, even if it is not so in actuality.
There is no official position known as the “exorcist” under Islamic law. However, in various parts of the Muslim world, titles have been given to those who practice exorcism.
For example, in India an exorcist is called an aamil. According to sharee'ah, exorcism is merely considered a method of treatment for the ill and for helping the needy.
Peace