Annostaso

Annostaso is a Finnish term used chiefly in pharmacology, toxicology, and medical labeling to denote a defined dosage level or dose threshold of a substance. It describes the amount of a drug or toxin that is recommended for a particular population or condition, and it may indicate the upper limit that should not be exceeded. The concept is closely related to, but distinct from, the act of dosing (annostus) and to dosing schedules (annostusväli). In practice, annostaso is given as a unit such as milligrams per kilogram of body weight (mg/kg), a fixed milligram dose for adults, or a maximum daily dose.

In clinical and regulatory texts, annostaso helps guide prescribing decisions and labeling. It is often stratified by age, weight, kidney or liver function, and comorbidity, and it can differ for acute versus chronic treatment. When a regimen specifies an annostaso, the practitioner applies the dose within the safety margin, adjusting for factors like start and stop criteria and monitoring for adverse effects.

The term is primarily found in Finnish sources and is not widely used in English-language pharmacology, where the terms dose, dosing, and dosing limit are preferred. See also annostus, annostusväli, and maksimiannos.