Table 1: Psychotropic bioactivity of THC in humans.

Examples of changes in human somatic, perceptual, and cognitive functions triggered by acute THC use.

somatic	perceptual	cognitive
light-headedness	euphoria	introspective states
“floating” feelings	loss of time sense	rapid flow of thoughts
pulse rate increases	increased body	dreamy
palpitation	awareness	loss of concentration
sweating	distortions of vision	disrupted memory
tremulousness	decreased hearing	anxiety
weakness	decreased paying attention	incoordination
numbness	mental confusion	sleepiness
	dizziness	difficulty in thinking
	blurring	difficulty in speaking
	fatigue	difficulty in reading
		difficulty in remembering