Antipsychotics Flashcards
Antipsychotic with the largest effect on EEG
Clozapine
Antipsychotic with the lowest effect on EEGs
Quetiapine
Receptor thought to mediate the erectile dysfunction side effects of antipsychotics
Cholinergic receptor antagonism
Causes of sexual dysfunction in antipsychotic use
Due to elevated prolactin levels
Anticholinergic and antiadrenergic effects independent of prolactin levels
Antipsychotics with greatest prolactin elevation
Risperidone/paliperidone
Antipsychotics with the greatest impact on sexual function
Risperidone/paliperidone
Haloperidol
Percentage of patients taking haloperidol and risperidone/paliperidone who report sexual dysfunction
70%
Antipsychotics with lowest sexual dysfunction effects
Aripiprazole
Asenapine
Lurasidone
Proposed mechanisms of action of antipsychotic related weight gain
5HT2A and 5HT2C antagonism D2 and D3 antagonism H1 antagonism M3 antagonism Hyperprolactinaemia Increased serum leptin leading to leptin desensitisation Ghrelin
Antipsychotics with high risk of weight gain
Clozapine
Olanzapine
Antipsychotics with moderate risk of weight gain
Chlorpromazine
Quetiapine
Risperidone
Paliperidone
Antipsychotics with low risk of weight gain
Amisulpride Asenapine Aripiprazole Haloperidol Sulpride Lurasidone Ziprasidone
Antipsychotic which has been seen to cause weight loss when used with clozapine or olanzapine
Aripiprazole
Antipsychotic associated weight gain liraglutide can be used for
Clozapine
Typical antipsychotic felt to be most effective in depot form - possibly with higher side effects
Zuclopenthixol
Atypical antipsychotics available in depot form
Risperidone - as risperdal consta or paliperidone
Olanzapine
Aripiprazole
Requirement for test dosing with depot antipsychotics
Always required for first generation antipsychotics
Should be considered for second generation antipsychotics if it is not clear if an oral dose has been taken
Base of second generation antipsychotic depot medications which is not known to be allergenic
Aqeous
Time during depot dosing when patients may be at highest risk of a relapse
Immediately after a depot dose
Time after withdrawing an antipsychotic depot when relapse occurs in trails
3-6 months after stopping
Site into which olanzapine depot must be injected
Gluteal
Cause of post injection syndrome in giving antipsychotic depots
Accidental entry into a blood vessel on administration
Features of post injection syndrome
Sedation Confusion Dizziness Agitation/aggression EPSEs HTN Convulsion
Typical antipsychotics
Chlorpromazine Flupenthixol Zuclopenthixol Perphenazine Sulpride Haloperidol
Atypical antipsychotics
Clozapine Risperidone Olanzapine Quetiapine Ziprasidone Amisulpride Aripiprazole
Active metabolite of thioridazine
Mesoridazine
Base of first generation antipsychotic medications
Coconut oil or sesame oil
Time after injection when depot flupentixol reaches peak levels
3-7 days
Time after injection when depot fluphenazine reaches peak levels
24 hours
Time after injection when depot haloperidol reaches peak levels
7 days
Time after injection when depot zuclopenthixol reaches peak levels
7 days
Active metabolite of risperidone
9-hydroxyrisperidone
Active metabolite of risperidone
Paliperidone
Active metabolite of aripiprazole
Dihydroaripiprazole
Depot antipsychotics which require oral cover after the first dose is administered
Risperidone
Pipotiazine
Atypical antipsychotic with the shortest half life
Qetiapine
Antipsychotics with a high risk of raised prolactin levels
All typical antipsychotics Risperidone Sulpride Amisulpride Paliperidone
Antipsychotics with a low risk of raised prolactin
Lurasidone
Olanzapine
Ziprasidone
Antipsychotics with a very low risk of prolactin elevation/prolactin sparing
Clozapine
Aripiprazole
Asenapine
Quetiapine
Advised duration of treatment with antipsychotics for schizophrenia
1-2 years
Incidence of post injection syndrome
<0.1%
Time frame within which post injection syndrome nearly always occurs
Within 1 hour of injection
Hours for which a patient must be supervised after olanzapine depot injection
3 hours
Antipsychotic associated with post injection syndrome
Olanzapine
Antipsychotic which can be given at highest doses in depot form
Flupentixol
Benefits to giving flupentixol in high doses compared to standard doses
Likely none
Depot form of olanzapine
Olanzapine pamoate/emboate
Antipsychotics most associated with postural hypotension
Risperidone Clozapine Olanzapine Paliperidone Quetiapine Ziprasidone
Antipsychotics to consider if postural hypotension is an issue
Amisulpride
Sulpride
Aripiprazole
Haloperidol
Most sedating antipsychotic
Clozapine
Antipsychotic associated with pathological gambling
Aripiprazole
Antipsychotic which should be given twice a day specifically at high doses
Amisulpride
Antipsychotic which causes photosensitivity reactions
Chlorpromazine
Antipsychotics which have high D2/low 5HT2 activity
Typical antipsychotics - typical of haloperidol
Antipsychotics which have high D2/high 5HT2 activity
Atypical antipsychotics - olanzapine, risperidone, loxapine
Antipsychotic which has low D2/high 5HT2 activity
Clozapine
Antipsychotic which could be considered to have low D2/low 5HT2 activity
Quetiapine
Antipsychotic best tolerated to treat side effects of Parkinson’s medication for patients with Parkinson’s disease
Quetiapine
Possible pharmacological bases for hypersalivation associated with clozapine
Muscarinic M4 agonism
Adrenergic alpha-2 antagonism
Inhibition of the swallowing reflex
Timings for patients on clozapine or olanzapine to have their lipids checked
3 monthly during first year of treatment
Yearly afterwards
Antipsychotic associated with reduced seizure threshold
Clozapine
Age group where antipsychotic related weight gain is more significant
Children
Most effective antipsychotic for schizophrenia in patients with hyponatraemia
Clozapine
Antipsychotic known for being a pure D2 antagonist
Sulpride
Antipsychotic most likely to induce seizures
Clozapine
Primary factor for classifying antipsychotics into first and second generation
Propensity for extrapyramidal side effects
Time frame within which the greatest improvement is seen after starting an antipsychotic
Within the first week
Most common cause of secondary amenorrhoea in patients on antipsychotics
Pregnancy
Antipsychotic associated with a contact dermatitis
Chlorpromazine
First generation antipsychotic also used as an antiemetic in palliative care
Chlorpromazine
Receptor chlorpromazine acts on to make in an effective antipsychotic
Dopamine receptors
Antipsychotics most likely to cause orthostatic hypotension
Clozapine
Risperidone
Antipsychotic most likely to cause nausea and vomiting
Aripiprazole
Antipsychotics associated with pigment deposit in the anterior lens capsule
Chlorpromazine
Thioridazine
Antipsychotic with the lowest dropout rate in the CATIE study
Olanzapine