Is it permissible to use the "marijuana" plant as a pain treatment, and is smoking it for this purpose forbidden due to its harm to the lungs, especially given the existence of pharmaceutical alternatives with greater harms?

Marijuana, which is hashish itself, is an intoxicant forbidden by consensus. Its consumption for treatment is not permitted except in cases of urgent necessity, after exhausting permissible or less harmful alternatives, and with a prescription from a trustworthy Muslim physician, while adhering strictly to the necessary amount. Caution must be exercised to avoid using treatment as a pretext for enjoying the intoxicant.