Correlation of paired toxic plasma and saliva paracetamol concentrations following deliberate self-poisoning with paracetamol.

What Is Already Known About This Subject: • Paracetamol is commonly used in deliberate self poisoning (DSP) and this requires blood sampling to refine risk assessment. If saliva concentrations agreed with plasma concentrations, then this could support the development of non-invasive testing. Our pilot work supports this hypothesis, but was largely confined to nontoxic concentrations.