[lawng-ak-ting, long-] /ˈlɔŋˈæk tɪŋ, ˈlɒŋ-/

adjective, Pharmacology.
(of a drug) slowly effective after initial dosage, but maintaining its effects over a long period of time, being slowly absorbed and persisting in the tissues before being excreted Compare intermediate-acting, short-acting


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