Nutmeg comes from a tree known for its aromatic seeds used as a spice. The consumption of nutmeg, particularly in large quantities, can have effects similar to narcotics, leading to various adverse health effects, including severe nervous system impairment.

The Islamic ruling on nutmeg varies:

1. Majority Opinion (Haram): Many scholars consider both small and large quantities of nutmeg haram because of its intoxicating effects. This view is supported by notable scholars like Ibn Hajar al-Haytami, who stated that nutmeg is either intoxicating or narcotic, thus falling under the general prohibition of all intoxicants.
2. Minority Opinion (Permissible in Small Amounts): Some scholars permit the use of small quantities of nutmeg when mixed with other substances, provided it does not cause intoxication or sedation. This opinion was supported in the 8th Fiqh Medical Symposium held in Kuwait, where it was concluded that using nutmeg in minimal amounts for flavoring food is permissible as long as it does not lead to intoxication or sedation.

Caution: The safest stance is to avoid nutmeg entirely, especially in significant quantities, due to its potential intoxicating effects. In Saudi Arabia, for instance, the importation of pure nutmeg is prohibited, although it is allowed as part of spice mixtures with a concentration not exceeding 20%.

Reference: Islam Q&A