Having a pharmaceutical effect principally in the long term.(adjective)
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Use "long-acting" in a sentence
"Although indacaterol is a new molecule, the product falls into a class of drugs known as long-acting beta agonists, or LABAs, which carry a safety concern of worsening asthma symptoms, which can be fatal."
"When it comes to reliability, the most effective contraceptives may be two so-called long-acting products many women haven't heard of:"
"TUESDAY, Oct. 25 HealthDay News -- When used alone, the asthma medications known as long-acting beta-agonists are associated with an increased risk of serious complications, new research indicates."