While noticing my friend entering the toilet with medical reading material, I wondered if it is legal to do that? Your kind fatwa is appreciated.

Praise be to Allah, the Lord of the Worlds; and Blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions. It is disliked to enter a toilet with something in which Allah’s name is mentioned. Other than these books or written material would be taken into a toilet, i.e. as long as Allah’s name is not upon them. Evidence from the Holy Qur’an: {And whoever honours the sacred things of Allah, then that is better for him with his Lord}. [22:30] It is proved from the Prophet Muhammad (Blessings and peace of Allah be upon him) that he used to remove his ring engraved with Muhammad Rasulullah (Muhammad is Allah’s Messenger) whenever he went to the toilet Allah knows best.