SCHIZOPHRENIA : BIOLOGICAL THERAPY Flashcards
what are antipsyhcotics
drugs used to reduce intensity of symptoms,
in particular +Ve symptoms of psychotic disorders liek schizophrenia
all antipsyhcotic drusg work as
dopamine antagonsits
what does working as dopamine antagnosist mean
reduction the action of dopamine in areas of the brai associted with symptoms of schizophrenia
what are the 2 types of antipsychotic drusg
typical/conventional
atypical
typical antipsychtoic developed in the
1950s
typical antipsychotics were the first
gerneatin of antipsychotics
give me an example of a typical antipsychotic
chlorpromazine
explai how typical antipsychotics such as chlorpromazine work as dopamine antagonists
reduce action of dopamine by binding to dopmaine receptors on psotynaprtic neuron w/o stimulating them
therfore preventing dopamine from binding to dopamine receptors
this normalises neurotransmission in key areas of the brain therfore reduce positive symptoms e.g hallucinations
what did the discovery of the antagnosit effect do
led to devlopmetn of dopamine hypothesis
what is the problem with blocking dopamine receptors in the way atypical drugs/antipsychotics do
research suggest 60-70% of dopamine receptors in MESOLIMBIC DOPMAINE PATHWAY must be blocked for drugs to be effective
to achieve this a numebr of dompaine receptors in other areas of the brin must aslo be blocked leading to undesirable side effects
tell me anout undesirable side effects
developmetn of extra pyramidal side effect such as tardive dyskinesis
this is involuntary movemtn of tongue , face , jaws
these durgs effcet extra pyramidal area of the brain which helps ctrl motor activity
as well as being an antipsychotic what can chloropromazine is also an effcetove
sedative
since chloropromazine is also a sedative whar is it often used to do
calm indis with schizophrenia as well as those that dont suffer
often done when 1st admitted to hospital and pt very anxious/middle of psychotic break
what are atypical antipsychotics
drusg for schixophrenia developed after antipsychotics
typically target a range of nt such as dopmaine and serotinin
2nd gen
when were atypical antipsychotics deelpoed
60s and 70s