Long-acting

adj

Definitions

Adjective
  1. 1
    Having a pharmaceutical effect principally in the long term.

    "I have tried all the medium and short acting non-barbiturate sedatives since the war (including thalidomide) but they don’t work and I don’t trust the newfangled long acting, “safe” analgesics."

Adjective
  1. 1
    active over a long period of time wordnet

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