Use of cannabis
commonly causes a
sense of euphoria,
relaxation, enhanced
appreciation of
sensory stimuli (food,
music, sex), and
increased sociability.
Physical effects include
increased heart rate
(tachycardia), lowered
blood pressure, and
injected conjunctiva
(red-eyes).
Naive users are more
likely to report
adverse psychological
effects such as anxiety
or paranoia from a
single dose. In
considering the
potential effects of
cannabis on an
individual, the
experience of the user
must be taken into
account, due to the
effects of tolerance
and learned behaviour.
A dose of cannabis
which could cause
intense intoxication in
a na"ve user may have
little or no effect in a
regular cannabis user.
On the other hand,
the effects of cannabis
can be quite subtle,
and na"ve users may
not experience an
effect until they have
learned to appreciate
it, or how to inhale
the drug effectively, a
situation known as
"reverse tolerance"