Found in tea. White, bitter-tasting crystalline substance. May increase blood pressure. Postpones fatigue, usually delays onset of sleep. Larger dose may produce headache, jitteriness, abnormally rapid heartbeat.
Cannabis is the most widely used illegal psychoactive drug in North America.
Marijuana, greyish green to greenish-brown, can be a fine substance resembling oregano or coarse, resembling tea. Hashish, with higher THC concentration, is sold in chunks ranging in colour from light brown to nearly black. Hash oil is a reddish brown or green oil extract. Later, user becomes quiet, reflective, sleepy. May impede tasks such as operating a motor vehicle.