(chiefly of a drug) having effects that last for a long time.
- ‘In the past, manufacturers of long-acting narcotics have marketed these products aggressively without underscoring their addictive risk.’
- ‘A single injection of a long-acting steroid such as triamcinolone (eg Kenalog) can bring symptoms under control quickly.’
- ‘It's probably easier to find in blood because it's a long-acting drug that isn't excreted in the urine, like most drugs.’
- ‘The AAP does not recommend routine use of pemoline, a long-acting stimulant, because of rare but potentially fatal hepatotoxicity.’
- ‘Despite her use of the long-acting drug preparation, she reported that the carbidopa-levodopa effect wore off after 3 to 4 hours.’