1st generation antipsychotics (TYPICAL) Flashcards
MoA
Blocks post-synaptic dopamine D2 receptors in the brain
Why are typical antipsychotics not preferred?
- More extrapyramidal symptoms (EPS)
- More hyperprolactinaemia
Phenothiazines
Hepatotoxic & acute dystonic reactions
Split into groups (1, 2 & 3)
Group 1
MOST SEDATIVE
- Chlorpromazine (contact sensitisation)
- Levomepromazine
- Promazine (used OTC as sedative)
Group 2
LEAST EPS
- Pericyazine
Group 3
MOST EPS
- Fluphenazine
- Perphenazine
- Prochlorperazine
- Trifluoperazine
Butyrophenones
Haloperidol
- Most EPS
- QT interval prolongation
Thioxanthenes
Flupentixol
Zuclopenthixol
Flupentixol
Alerting effect
Should not take in evening
Zuclopenthixol
Depot preparation
Used in agitated/aggressive patients
More effective in preventing relapse
Others
Pimozide (QT interval prolongation
Sulpiride
Loxapine (bronchospasms)