Recreational Toxicology Flashcards
Ricin structure
A chain + B chain
Ricin MOA
Breaks down proteins
Ricin poisoning management
Nothing to do in acute phase
Supportive treatment
LD50
Lethal dose that kills 50% of the population
What state are most nerve agents in at room temp
Liquid, then evaporate into gas
What type of agent is Sarin
Organophosphate
2 pneumonics for symptoms of organophosphate poisoning/ cholinergic crisis
DUMBELLS -
diarrhoea
Urination
Myosis
Bronchorrhea
Bradycardia
Emesis
Lacrimation
Lethargy
Salivation/Sweating / Seizures
SLUDGE
Sweating/ Salivation / Seizures
Lacrimation
Urination
Diarrhoea
GI cramps + pain
Emesis
Organophosphate poisoning red flags
Secretions + Seizures
Main nerve agent antidote
Atropine - dries up secretions
Most ‘problematic’ cholinergic sx
Bronchorrhea
Which services carry atropine
Ambulances carry 4 self help packs
Large volumes carried by specialist providers
Cholinergics
Compounds that mimic the action of acetylcholine +/or butyrylcholine
Muscarinic
Type of ACH receptor involved in parasympathetic nervous system
Decreases HR, GI muscle contraction, incr GI secretions, incr gland secretion, urine release, contracts eye muscles, erections
Nicotinic
Type of ACH receptor
Involved in neuro transmission, neuro modulation, cognitive function, and voluntary motor control, adrenaline+noradrenaline release + sympathetic nervous system activation
Anticholinergic
Class of drugs that block ACH
Reduce secretions, have many side effects
Used for allergic and inflam disease, Parkinson’s, overactive bladder, and motion sickness
Acetylcholine
Excitatory Neurotransmitter that acts on muscarinic and Nicotinic receptors
Cholinesterase
Enzyme present in the CNS that catalyses hydrolysis of ACH into acetic acid and choline
Anticholinesterase
Class of drugs that inhibit breakdown of ACh
Used for Alzheimer’s and myasthenia Gravis
Novichok, organophosphate
Ageing
biochemical process by which the agent-enzyme complex becomes completely resistant to oxime reactivation
Makes binding irreversible
Cyanide toxicity treatment
1) nitrates 2) methylene blue
Cyanide + nitrate -> methylHb
MethylHb + methylene blue -> Hb