Questions Flashcards
What are the 4 signs of neuroleptic malignant syndrome?
Rigidity (lead pipe type)
Hyperthermia >38 degrees
Reduced consciousness
Autonomic instability - labile BP, tachycardia, tremor, excessive sweating
What is the mechanism behind neuroleptic malignant syndrome?
It is loss blockage of dopaminergic receptors in the hypothalamus
What are some of the risk factors for developing neuroleptic malignant syndrome?
High dose or rapid initiation of neuroleptics
Abruptly stopping neuroleptics
Previous episode of NMS
Dehydration
What investigations would suggest Neuroleptic malignant syndrome?
Leucocytosis on FBC
Increased creatine kinase and metabolic disturbance from AKI
Hypocalcaemia
LFTs - elevated ALT
What is the treatment of neuroleptic malignant syndrome?
Antipsychotic must be withdrawn immediately
IV fluids and antipyretics
Bromocriptine (dopamine agonist)
Dantrolene can be used to reduce muscle spasm
ECT activates dopaminergic system
What are the complications of neuroleptic malignant syndrome?
Cardiac arrest
Seizures
AKI
What is serotonin syndrome?
This is symptoms caused by increased 5-HT activity in the brain, usually caused by interactions between drugs e.g. SSRI and MAOI
What are the symptoms of serotonin syndrome?
Confusion
Myolonic jerks
Hyperreflexia
Mania
What is the treatment of serotonin syndrome?
Stop offending drug
Supportive treatment
What drugs cause serotonin syndrome?
SSRI
MAOI
SNRI
St johns wort
What is an acute dystonia?
This is a sudden muscle contraction that is sustained and results in abnormal positioning, often painful
What are some examples of acute dystonias?
Oculogyric crisis
Torticollis (neck)
Facial grimacing
What is the cause of acute dystonias?
usually caused by antipsychotics
What is the treatment of an acute dystonic reaction?
Immediately discontinue the antipsychotic and consider using a different one
use anticholinergic (Procyclidine) with massage of muscle
Prescribe procyclide on a PRN basis
Monitor over 24 hours
How often do you need to measure lithium levels?
Every 5 days until stable and then 3 monthly