Nose drops made of Indian costus may be used to annoy stubborn jinn [who has possessed a person and is not easily expelled]. The patient should take it in through the nose, so that the costus goes straight to the brain where the jinn is located, and he will be greatly annoyed by it, so much so that he will not be able to bear it and will hasten to flee, or he will talk to the practitioner and promise to leave and not come back. The Sunnah mentions the virtues of Indian costus, such as in the report narrated by Al-Bukhaari (may Allah have mercy on him) in his Saheeh:
It was narrated that Umm Qays bint Mihsan said: I heard the Prophet say:
"You should use the Indian incense [al-'ud al-hindi] for in it is healing for seven diseases. It may be taken in the form of nose drops for trouble in the throat or given in the side of the mouth for pleurisy."
How to administer nose drops made of Indian costus
An Uqiyah of Indian costus should be ground to a powder.
In Fath Al-Baari, Ibn Hajar described how to use Indian costus. He said: The patient should be made to lie on his back, and something should be placed beneath his shoulders in order to raise them, so that his head will be tipped back. Drops of olive oil mixed with costus should then be placed in his nose so that they may reach the brain and whatever sickness is present may be expelled by sneezing.
Usually the jinn may be expelled in this fashion, but if the jinn comes out and then goes back for any reason, such as if there was a compelling reason why he entered the patient, then the patient should record the following Soorahs [of the Qur'aan] on a tape and listen to them:
Al-Faatihah, Al-Baqarah, Aal 'Imraan, Al-Tawbah, Ya-Seen, Al-Saaffaat, Al-Dukhaan, Qaaf, Al-Rahmaan, Al-Mulk, Al-Jinn, Al-Kafiroon, Al-Ikhlas, Al-Falaq and Al-Naas.
-- Dr. Abu'l-Mundhir Khaleel ibn Ibraaheem Ameen, The Jinn and Human Sickness: Remedies in the Light of the Qur'aan & Sunnah. Riyadh: Darussalam, 2005, pp. 128- 131.