Narcotics are considered unwholesome things which Allah has forbidden for His believing servants. Allah only makes wholesome things lawful for people. Allah (Glorified be He) says in Surah Al-Ma'idah:
They ask you (O Muhammad صلى الله عليه وسلم) what is lawful for them (as food). Say: "Lawful unto you are At-Tayyibât [all kinds of Halâl (lawful-good) foods which Allâh has made lawful (meat of slaughtered eatable animals, milk products, fats, vegetables and fruits)].
Describing the character of our Prophet Muhammad (peace be upon him) in Surah Al-A`raf, Allah says:
...he allows them as lawful At-Tayyibât (i.e. all good and lawful as regards things, deeds, beliefs, persons, foods), and prohibits them as unlawful Al-Khabâ’ith (i.e. all evil and unlawful as regards things, deeds, beliefs, persons and foods)
It is also
related by Abu Dawud
"on the authority of
Um Salamah (may Allah be pleased with her) who narrated that the Prophet (peace be upon him) forbade every intoxicant and everything which produces languidness."
It is well known that narcotics cause stupor and are very harmful. The Prophet (peace be upon him) said,
"There should be neither harming nor reciprocating harm."
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.