BIOLOGICAL APPROACH: DRUG THERAPY Flashcards
(56 cards)
describe the three main types of psychoactive drugs.
The three main types of psychoactive drugs are
1.antipsychotics,
2. antidepressants
3. antianxiety drugs.
what do antipsychotics treat?
1) Antipsychotic drugs treat psychotic mental disorders.
2) They also control manic depression.
give an example of a psychotic mental disorder + briefly explain what this constitutes.
1)like schizophrenia,
2) whereupon an individual has lost touch with reality.
describe the etiology of these psychotic disorders.
Both of which are characterised by increased dopamine levels.
how do antipsychotics aim to treat this?
thus antipsychotics aim to reduce dopamine levels in the brain.
what are the two types of antipsychotics?
There are two types of antipsychotics;
1 typical
2 atypical.
describe what typical antipsychotics DID, providing an example.
1)Typical antipsychotics
2) such as Loxapine
3) were first used primarily to combat positive symptoms of schizophrenia,
how do typical antipsychotics work?
Typical antipsychotics work by:
1. binding to dopamine receptors
2. permanently blocking their action,
3. thus eliminating positive symptoms.
there are two types of schizophrenic symptoms: positive and negative. what are positive symptoms, giving an example?
1)Positive symptoms are added to normal behaviour,
2)like delusions and hallucinations.
what are negative symptoms, giving an example?
1)whereas negative symptoms remove from normal behaviour,
2)for example, lack of motivation in schizoids.
describe when atypical antipsychotics developed, providing an example.
1) Atypical antipsychotic drugs developed more modernly in the 1990s.
2) such as Clozaril
describe how antipsychotics work.
These act by
1)only temporarily occupying dopamine receptors,
2)then rapidly dissociating
to allow normal dopamine transmission.
how are these atypical antipsychotics effective? provide empirical evidence.
1)This offers lower levels of side effects like tardive dyskinesia,
2)whilst allowing for the pleasurable effects of dopamine transmission
3) and concurrently reducing the risk of suicidal side effects compared with typical psychotics
(Meltzer & Gadaleta, 2021).
secondly, antidepressants. What do antidepressants treat?
1)Secondly, antidepressants treat the symptoms of unipolar depression,
2)the most common form of depression. .
symptoms of, as a disdavantage of drug therapy = not treating cause
what do antidepressants assume the etiology of depression is?
This acts by the assumption that
depression is
- caused by insufficient amounts of the serotonin neurotransmitter production
- into the synapse.
give an example of one type of antidepressants.
Monoamine oxidase inhibitors (MAOIs)
monoamine oxidASE= enzyme, INHIBITors = prevent,
how do MAOIs work?
1) work by blocking the enzymes that break down serotonin,
2) so that the amount of serotonin available to stimulate other neurons is increased.
what is the function of serotonin? how does this enable the use of MAOIs?
1) Serotonin is responsible for mood regulation and is associated with happiness.
2) MAOIs thus allow the patient to feel happier.
inhibit break down of serotonin-> more in synapse -> more absorbed -> :)
name the second type of antidepressant.
Additionally are selective serotonin reuptake inhibitors (SSRIs),
describe SSRIs briefly with an example.
the most commonly prescribed antidepressants,
including Prozacs.
think - inhibits reuptake of serotonin
how did SSRIs work?
These work by:
1. blocking the transport mechanism that reabsorbs serotonin into the presynaptic cell after it has fired,
2. leaving more of the serotonin in the synapse,
3. increasing ease of transmission of the next impulse,
4. so that ‘normal serotonin transmission can occur, lessening depressive symptoms.
thirdly are anti-anxiety drugs. what do these treat?
Thirdly are anti anxiety drugs, used to treat anxiety and stress,
give examples of anti-anxiety drugs.
most commonly:
1. benzodiazepines (BZs),
2. Librium
3. or Valium
what do benzodiazepienes (BZs) do?
BZs slow down the activity of the central nervous system .