BIOL 1010 Lecture Notes - Barbiturate, Morphine, Diazepam

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30 Jan 2013
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Cannabis sativa is the most often smoked, but may be chewed, prepared as eta or
eaten in baked goods
Hashish: much stronger than marijuana and is produced by removing and ring the
resin exudates of the tops of high quality cannabis plants
Originally the hemp plant was used in manufacturing cloth and rope but then it was
noted for its treatment for rheumatism, gout, depression, cholera and neuralgia
When alcohol was banned more and more people started using this for pleasure
Effects of Marijuana
Psychological Effects
Intoxication depends on its potency and size of dose
Makes them feel relaxed and sociable
Large doses bring rapid shifts in emotion, to dull attention, to garment thought and
to impair memory
Time seems to move more slowly
Extremely heavy doses hallucinations and other effects similar to LSD (extreme
panic)
Major active chemical in marijuana is delta-9-tetrahydrocannabinol (THC)
The amount of this is variable
Daily users are more likely to use multiple substances and suffer from an anxiety
disorder
Being high on marijuana impairs the complex psychomotor skills necessary for
driving
Studies show a diminished IQ score for heavy users but not light users
Somatic Effects
Short term effects are bloodshot and itchy eyes, dry mouth and throat, increased
appetite, reduced pressure within the eye and somewhat raised eye blood pressure
It elevates heart rate sometimes dramatically
Long term use seriously impairs lung structure and function
Marijuana users smoke fewer cigarettes than tobacco smokers but retain it in their
lungs for much longer periods of time
The timing of starting marijuana matters a lot also
If people develop a physical dependency on marijuana, it is less serious than
dependency on nicotine, cocaine and alcohol
Experienced smokers need only a few hits or puffs to become high from a marijuana
cigarette, whereas less experienced users puff many times to reach a similar state of
intoxication
Therapeutic Effects
THC and related drugs can reduce the nausea and loss of appetite that accompany
chemotherapy for some cancer patients
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