Some people with bipolar disorder who use cannabis (marijuana) claim that it eases the
symptoms of depression and mania. There are many chemicals (called cannabinoids) found in
cannabis but two particular ones appear to have medicinal (therapeutic) effects. These two
compounds are: delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). These cannabinoids
appear to have mood, anxiety, and sedative effects as well as have antipsychotic and
anticonvulsant properties. This study will try to find out if these cannabinoids can be of
benefit as an add-on treatment in bipolar disorder and what effects it has on thinking power
and memory.