Is cannabis (weed) haram?

Why the scholars forbid it

The ruling does not rest on cannabis being named in the Qur'an or Sunnah — it did not exist in the Prophet's ﷺ lifetime. Ibn Taymiyyah notes that the four imams never spoke of it because it appeared only at the end of the sixth century and the beginning of the seventh, with the rise of the Tatar state. The scholars instead applied the texts on intoxicants to it, because the operative cause ('illah) in those texts is the removal of the mind, and cannabis removes the mind.

The Prophet ﷺ stated the principle in general terms:

"Every intoxicant is khamr, and every khamr is haram."— Sahih Muslim, from Ibn Umar

And in another narration:

"Every intoxicant is haram."— Sahih al-Bukhari 4343 and Sahih Muslim 1733, from Abu Musa al-Ash'ari

Because the ruling follows the cause — wherever the cause is found, the ruling is found — the scholars extended it to everything that covers the intellect, whether drunk, eaten, smoked or injected. Ibn Taymiyyah put the application plainly:

"This solid hashish is haram, whether one becomes intoxicated by it or not; and intoxication from it is haram by the agreement of the Muslims."— Ibn Taymiyyah, Majmu' al-Fatawa

What the schools hold

The four schools converge on the prohibition, though they differ on some of its details.

Al-Qarafi's dissent is worth naming honestly: he argued cannabis is a mufsid (corrupter of the mind) rather than a muskir (intoxicant), because it does not produce the elation and aggression of wine — and therefore carries no hadd. Ibn Taymiyyah rejected this reasoning directly, noting that users do experience elation and craving, that it turns them from the remembrance of Allah and from prayer, and that it brings additional harms of its own.

The harms the scholars cite

The classical scholars did not treat this as a merely technical question. Al-Subki, quoted by Ibn Taymiyyah, listed well over a hundred religious and worldly harms attributed to it, including dullness of mind, forgetfulness, damage to the body, loss of offspring, sudden death, and the breakdown of modesty and protective jealousy. Ibn Taymiyyah observed that it is worse than wine from one angle — it corrupts the mind and constitution and produces effeminacy and cuckoldry — while wine is worse from another, since it leads to quarrelling and fighting. Both, he said, turn a person away from the remembrance of Allah and from prayer.

The Permanent Committee adds that its sale, purchase and use — eating, drinking or chewing — are all forbidden, and that its price may not be consumed.

If you are using it

The scholars are clear that the way out is repentance, and that it must be real. Ibn Taymiyyah held that a person who regards it as lawful has disbelieved. IslamWeb (fatwa 133387) adds a point that matters practically: do not let the sin pull you into a worse one. Abandoning the prayer is a greater sin than using cannabis, and some scholars held that the one who deliberately abandons it has left Islam. Praying while struggling with this is better than abandoning the prayer alongside it — but the goal is to leave both behind.

Key takeaways

• Cannabis is haram by the agreement of the four schools, because it intoxicates and clouds the mind.
• The ruling follows the cause: anything that removes the intellect falls under the Prophet's ﷺ prohibition of every intoxicant, whatever form it takes.
• Its sale, purchase and price are also forbidden, not only its personal use.
• Repentance is the way out — and never treat it by abandoning the prayer, which is the graver sin.
• Al-Qarafi dissented on the hadd punishment, holding it a corrupter rather than an intoxicant; Ibn Taymiyyah rejected this reasoning.

Further reading

• Ibn Taymiyyah, al-Siyasah al-Shar'iyyah and Majmu' al-Fatawa
• al-Qarafi, al-Furuq
• Ibn Hajar al-Haytami, al-Zawajir 'an Iqtiraf al-Kaba'ir

And Allah knows best.