drugs and consciousness
DESCRIPTION
Drugs and Consciousness. Psychoactive Drug: A chemical substance that alters perceptions and mood (effects consciousness). Substance Use and Abuse. Substance Use Using a substance but it does not yet interfere with a person’s life Substance Abuse - PowerPoint PPT PresentationTRANSCRIPT
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Drugs and Consciousness
Psychoactive Drug: A chemical substance that alters perceptions and mood (effects
consciousness).
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Substance Use and Abuse
• Substance Use– Using a substance but it does not yet interfere
with a person’s life
• Substance Abuse– Pattern of drug use that diminishes one’s ability
to fulfill responsibilities– May result in repeated use in dangerous
situations– May lead to legal difficulties related to drug use
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Substance Use and Abuse
• Dependence– Compulsive use of a substance– Also known as addiction– Can be physical, psychological or both
• Withdrawal– After addiction, physical discomfort when the
substance is stopped
• Tolerance– More substance is required to obtain the original
effect
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Dependence(4 of the following 7 symptoms)
• Developing a tolerance• Experiencing withdrawal• Using substance for a
longer period or in greater quantities than intended
• Presence of a desire or repeated attempts to cut back on use
• Spending a lot of time using/obtaining the substance
• Reduction or cessation of usual activities
• Continued use despite awareness of drug’s harmful effects
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Dependence
• Psychological addiction is a psychological need to use a drug, particularly for relieving mental stress and negative emotions.
• Physical addiction is the need for a drug to alleviate physical pain. When the drug is discontinued, there are several withdrawal symptoms.
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Let’s talk about drugs, man.
Psychoactive drugs are divided into three groups.
1. Depressants 2. Stimulants3. Hallucinogen
s
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Depressants
• Depressant drugs reduce neural activity and slow body functions. They include:
• Common depressants are– Alcohol– Barbiturates– Opiates
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Alcohol
• Most used psychoactive drug in Western societies
• Although most often used in moderation, about 14 million Americans have problems with alcohol
• Men are three times more likely to be problem drinkers
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Alcohol
• Highly addictive• Even moderate amounts can affect
– Perception– Motor processes– Memory– Judgment– Visual acuity– Depth perception– Cognitive functioning
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Alcohol
• Overall effect is to calm the nervous system
• Sometimes perceived as a stimulant because it relaxes inhibitions
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Barbiturates
• “Downers”
• Often Used to treat insomnia
• Can interfere with sleep patterns and cause dependence
• Effects are similar to alcohol
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Opiates
• Derived from the opium poppy
• Includes opium, morphine, and heroin
• Opiates resemble endorphins, the body’s natural painkillers
• Causes euphoria followed by clouded mental functioning
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Stimulants
• Substances that excite the central nervous system
• Includes drugs such as– Caffeine– Nicotine– Cocaine– Ecstasy– Amphetamines– Methamphetamines
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Caffeine
• Naturally occurring substance found in coffee, tea, cocoa, and chocolate
• Also added to soft drinks and pain medications
• Increases alertness
• In high doses, caffeine can cause anxiety, headaches, heart palpitations, insomnia, and diarrhea
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Nicotine
• Found in tobacco• Considered by many to be the most addictive
stimulant in use today• Affects levels of several neurotransmitters• Depending on amount and time smoked, can
have either sedative or stimulating effects• Can lead to numerous withdrawal symptoms,
including nervousness, headaches, and irritability
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Amphetamines
Amphetamines stimulate neural activity, causing accelerated body functions and associated energy
and mood changes, with devastating effects.
National Pictures/ T
opham/ T
he Image W
orks
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Amphetamines
• Chemically similar to epinepherine, a hormone that activates the sympathetic nervous system
• Increase alertness as well as feelings of well-being
• Can cause euphoria followed by a crash, including severe depression
• Leads to cycle of addiction
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Amphetamines
• Forms can include methamphetamine and ecstasy (MDMA)
• Ecstasy acts as both a stimulant and hallucinogen
• Even short-term use of ecstasy may have long-term consequences
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Ecstasy
Ecstasy or Methylenedioxymethamph
etamine (MDMA) is a stimulant and mild
hallucinogen. It produces a euphoric high and can
damage serotonin-producing neurons, which
results in a permanent deflation of mood and
impairment of memory.
Greg S
mith/ A
P P
hotos
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Cocaine
• Blocks reabsorption of dopamine
• Produces increased alertness, motivation, and euphoria
• Crash leads to anxiety, depression, and strong cravings
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Hallucinogens
• Substances that distort visual and auditory perception
• LSD– Produces hallucinations and delusions similar
to a psychotic state– Can result in psychosis, memory loss,
paranoia, panic attacks, nightmares and aggression
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Marijuana
• THC, the active ingredient in marijuana, produces symptoms such as– Mild hallucinations– Euphoria– Enhanced sense of well-being– Relaxation– Distortion of time
• Some users may experience anxiety and paranoia
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Explaining Abuse and Addiction
• Biological factors– Some people may be genetically predisposed
to addiction– Dopamine reward circuit
• Psychological, social, and cultural factors– Expectations, social setting, and cultural
beliefs and values can affect usage patterns– Attitudes and beliefs about drug use may
come from family environment