DRUGS OF ABUSE Flashcards
What are different theories of drug abuse?
Psychodynamic factors
Genetic factors
Neurochemical factors
What are the major NTs?
Opioids & Catecholamines
What neurons project to the cortical and limbic regions in the nucleus accumbens?
Dopaminergic neurons in the ventral tegmental area
What is the largest grp of adrenergic neurons that could mediate the effects of opiates & opioids?
Locus coeruleus
What is the main cause of drug abuse & dependence?
Drug abuse& dependence
What is the time of detectability of alcohol, amphetamine, cannabis, & methamphetamine?
ALcohol = 6-24 hrs
Amphetamine = 1-4 days
Cannabis: 15-30days
Methamphetapine = 3-5 days
What are different toxins that can induce potential health consequence if abused?
Stimulants
Cannabinoids
Opioids & Morphine derivatives
Depressants
Hallucinogens
What are effects of Stimulant withdrawal?
Depression
INC appetite
Psychomotor retardation
Emotional rxn
Slowed movements
Sleep disturbances
Miosis
What are effects of Psychoactive drugs?
Distortion of a person’s sensory perception, mood, & though, enhancement of feelings & Introspection
What are diff effects of LSD & Mescaline?
INC body temperature, Heart rate, BP, loss of appetite, sleeplessness, numbness, weakness, tremors
What are effects of MDMA?
INC effect of serptonin & catecholamines (life-threatening of tachycardia)
What are withdrawal symptms of depressants?
Anxiety, tremors, seizures, insomnia
What are questions to ask in the CAGE qnnaire?
Have you every felt you should Cut down on ur drinking?
Have ppl Annoyed u by criticizing ur drinking?
Have u ever felt bad or Guilty abt ur drinking?
Have u ever had a drink 1st thing in the morning to “Steady your nerves” or get rid of hangover ((eye opener)?
What score should one get that would mean high sensitivity for identifcatio of excessive drinking & alcoholidsm?
2 or higher
What is the retrospect of CAGE Qnnaire?
Last 12 months
What are the different molecular interactions that mediate effects of ethanol?
GABA receptor system
NMDA receptor system
Serotonin receptor system
What is the effect of ethanol to GABA receptro system?
INC action of GABA -> Sedative, ANticonvulsant, Anxiolytic
What is the effect of ethanol to NMDA receptor system?
Potent inhibitor of NMDA receptor function —> sedative, anticonvulsant, anxiolytic
What is the effect of ethanol to Serotonin receptor system?
Can reinforce intoxicating effect of ethanol
Where is alcohol absorbed?
Small intestine & colon
What enzymes break down alcohol to acetaldehyde?
CYP2E1& Catalase
Which of the 2 enzymes responsible for alcohol breakdown is used when there are large amts of alcohol & what if its only a small fraction of alcohol?
Catalase: small fraction
CYP2E1: large amts
Why is it that women have more alcohol in the body than men?
Women = have > subcutaneous fat -> alcohol concentrated in the body fluids
When do seizures occure from alcohol ingestion?
Wihtin 24 hrs
When does delirium tremens occur?
Within 24 hrs to 72 hrs after onset of abstinence
What are the different symptoms assoc with delirium tremens?
High fever
Marked confusion
Severe autonomic hyperactivity
Anxiety
Agitation & mental fluctuation
WHat are tx of delirium tremens?
Tx symptomatically
Thiamine
Fluid recplacement
Tx hyperthermia
Sedate w/ diazepam
Control seizure
Treat psychosis
What condition can occur due to thiamine def?
Wernicke-Korsakoff
Wernicke’s encephalopathy: severe acute def of VItamin B1 (thiamine)
Korsakoff’s psychosis = chronic neurologic sequela of Wernicke’s encephalopathy
What drugs are not advised to interact with alcohol?
2nd gen cephalosporins
Metronidazole
Trimethoprim
Sulfamethoxazole
Isoniazid
What is the effect of analgesics + alcohol?
INC risk of ulcer or GI bleed