What is/are Diflunisal?
Diflunisal is a non-steroidal anti-inflammatory drug (NSAID). It was developed by Merck Sharp & Dohme in 1971 after showing promise in a research project studying more potent chemical analogs of aspirin. It was first sold under the brand name Dolobid, marketed by Merck & Co., but generic versions are now widely available. It is available in 250 mg and 500 mg tablets.
Like all NSAIDs, diflunisal acts by inhibiting the production of prostaglandins, hormones which are involved in inflammation and pain. Diflunisal also has an antipyretic effect, but this is not a recommended use of the drug. Though diflunisal has an onset time of 1 hour, and maximum analgesia at 2 to 3 hours, the plasma levels of diflunisal will not be steady until repeated doses are taken. The long plasma half-life is a distinctive feature of diflunisal in comparison to similar drugs. To increase the rate at which the diflunisal plasma levels become steady, a loading dose is usually used. It is primarily used to treat symptoms of arthritis, and for acute pain following oral surgery, especially removal of wisdom teeth.
Effectiveness of diflunisal is similar to other NSAIDs, but the duration of action is twelve hours or more. This means fewer doses per day are required for chronic administration. In acute use, it is popular in dentistry when a single dose after oral surgery can maintain analgesia until the patient is asleep that night.
The inhibition of prostaglandins has the effect of decreasing the protection given to the stomach from its own acid. Like all NSAIDS, this leads to an increased risk of stomach ulcers, and their complications, with long-term use.
- Pain, mild to moderate
- Rheumatoid arthritis
- Injury to tendons
- ATTR amyloidosis (harrison 17ed page 2148)
- Hypersensitivity to aspirin/NSAID-induced asthma or urticaria
- Aspirin triad
- 3rd trimester pregnancy
- CABG surgery (peri-op pain)
This article uses material from the Wikipedia article Diflunisal, which is released under the Creative Commons Attribution-Share-Alike License 3.0.