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TOX TABLES


Salycilates (Aspirin, Oil of Wintergreen)

IMPORTANT SHIT

Toxic dose probably >150 mg/kg, >500 mg/kg = fatal

Salyclism - N+V, vertigo, tinnitus, seizures, hyperthermia, dehydration, coma CVS collapse

Initial Resp alkalosis >> HAGMA

Role of Alkalinisation
Systemic - alkalosis promotes ionised form. Acidosis causes non-ionised form which crosses BBB causing neurotoxicity
Urine - Alkalinisation promotes ionised form >> Decreased reabsorption

SPECIFIC ANTIDOTE

Urinary Alkalinisation
Sodium bicarbonate 8.4% 1 mL/kg up to 100 mL (1 mmol/kg up to 100 mmol) intravenously, as an initial dose
FOLLOWED BY
sodium bicarbonate 25 mmol/hour by intravenous infusion.
  • Add 150 mL of sodium bicarbonate 8.4% to 850 mL glucose 5%, infuse at a rate of 166 mL/hour
K+ replacement
Glucose
Intubate and hyperventilate - acidosis on induction is fatal - bag through apnoea
Dialysis - ARF, Acidosis, Toxic, Level >4 despite treatment

Endpoints: Urine pH >7.5
Self-rate: