The scientific study of drug doses, their effects, and how to administer them properly.
From Greek 'dosis' (dose) + '-ology' (study of). This is a specialized medical and pharmaceutical science term formed in the 19th century as pharmacology became more systematic.
Dosiology is why modern medicine is so much safer than historical medicine—scientists now precisely measure how much drug your body needs based on weight, age, and other factors!
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