my take is that many effects are increased and decreased with direct relation to thc and cannabinoid intake levels or fluctuation in use.
the degree of ill effects due to paranoia, anxiety, psychosis, hallucinations, motor function, carcinogens, etc. all fluctuate depending on consumption levels and tolerance.
over longer periods of time, dosages need to increase to obtain the same high,
which means that the most dangerous is recreational use, which always ends up in dependence or in tolerance to the drug.
lack of motivation, agoraphobia, nervousness, fear, laziness, sleepiness, headaches, panic attacks, anxiety attacks,
are magnified if not 100% caused by the drug in many instances.
BUT
every maintenance addiction/dependence is tolerated by the user in different yet similar ways. I dont know anything about the medical uses of marijuana, but
as an addict since the mid-90's i can surely attest that levels can calm these same illnesses, or at least they can if they are present in an addict
(or former addict if legality ever kicks in).
paranoia + psychosis + panic attacks + marijuana use (all present in the same patient) actually has benefits... the magnified prevalent abnormal illness helps the patient
make deeper distinguishing traits between abnormal and normal symptoms on a beneficial level.