In increases human heart rate while slowing it in some animals. It serves as a sedative hypnotic in some animals except at high dose levels. Effects on aggressiveness are contradictory. THC intoxication appears to be something that must be learned. Those using THC by themselves often simply fall asleep.
Psychological effects vary with the dose.
This is followed by a feeling of hilarity and mirth. A sense of euphoria, well-being and relaxation accompanies the mirth. Higher doses produce a dreamy, carefree state characterized by distortions of time and space. Enhanced body awareness occurs. External experience is glorified, and details take on supernatural importance.