long-acting

[lawng-ak-ting, long-]
adjective Pharmacology.

Origin:
1950–55

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long-acting
 
adj
intermediate-acting Compare short-acting (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

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Example sentences
Our two-year election cycle leaves little time for long-acting changes to ripen
  and be judged fairly.
We began with a mix of short- and long-acting morphine to dampen its side
  effects and minimize the number of pills.
But a tranquilizer for sure, one long-acting enough to get me past this crush
  of reality shows.
Urinary incontinence may occur, particularly in elderly patients and when
  taking long-acting formulations.
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