Cannabis contains a chemical called THC, tetra-hydro-cannabinol, the active ingredient, which gets you stoned.

The Government of Belgium reported that it had no objection to the proposed rescheduling but pointed out that the problem of the distinction between tinctures and extracts of cannabis listed under Schedule I of the 1961 Convention as amended and the mixture of delta cannabinols remained, because it is often difficult to make the distinction between the two at the level of control.