High is a term used to describe being under the influence of marijuana. Symptoms vary, but can include: increased heart rate, dry mouth, low attention span, sensation of deep relaxation, heightened sense of enjoyment and increased appetite.
This “high” is produced by the chemical thc, which enters the brain within seconds of consumption, causing feelings of euphoria, relaxed inhibitions, fragmentary thoughts, lack of concentration, impaired memory, drowsiness, and even sudden panic or paranoia.