Harmful Effects of NSAIDs
NSAIDs, which include aspirin, ibuprofen, salicylates, and naproxen, are among the most commonly prescribed medications for inflammation resulting from rheumatoid arthritis, joint conditions, osteoarthritis, gouty arthritis, joint and muscle discomfort associated with systemic lupus erythematosus, and other musculoskeletal disorders.(1) In some cases, this overeliance on NSAIDs has proved deadly. Annually, 76,000 people are hospitalized from NSAID-induced gastrointestinal complications. The American Medical Association estimates that from 50-80 percent of those hospitalized for gastrointestinal bleeding are taking some form of NSAIDs. At this stage in the medication-induced bleeding, there is a ten percent chance of fatality.(2)
NSAIDs lethal effects result from the inhibition of the biosynthesis of prostaglandins. NSAIDs block cyclo-oxygenase, the enzyme responsible for catalyzing the reactions of arachidonic acid to endoperoxide compounds. This process results in the inhibition of gastric prostaglandin E, a hormone which protects the lining of the stomach from acid. After prolonged and frequent ingestion of NSAIDs, the stomach remains defenseless and at increased susceptibility to ulcers.(3-4) If an ulcer erodes into a blood vessel, bleeding results. An ulcer can destroy part of the stomach and duodenal walls, leaving a gap that requires immediate surgery.
In one study, 1,826 osteoarthritis or rheumatoid arthritis patients who had been taking NSAIDs for six months or more and who had been unable to tolerate continuous NSAID use because of adverse gastrointestinal symptoms were examined endoscopically for gastroduodenal lesions and ulcers. Clinically significant gastroduodenal lesions were found in 37.1 percent of the patients. Of those, 24 percent had ulcers. The prevalence of gastroduodenal ulcers increased with age, duration of osteoarthritis, and duration of current NSAID use. The authors of the study wrote: "These results provide further endoscopic confirmation of the association between NSAID use and gastroduodenal lesions and ulcers and support the contention that safer treatment alternatives to conventional NSAIDs are required."(5)
That advice is particularly wise in light of the other effects NSAIDs have on the gastrointestinal tract. In one group of 312 NSAID takers, 20 percent had levels of inflammation comparable to that previously reported in patients with inflammatory bowel disease.(6) Besides damaging the gastrointestinal tract, NSAIDs also interfere with and suppress bone repair and remodeling. One paper presented data obtained over a 12-year period, and outlined the effects of NSAIDs on the matrix synthesis and turnover in 650 arthritic and 180 non-arthritic human cartilages. The study showed that one category of NSAIDs that includes Naproxen, ibuprofen, indomethacin, and nimezulide significantly inhibited matrix synthesis and had toxic effects on cartilage metabolism.(7) Thus, it appears that the drugs many patients take to relieve their arthritic pains actually contributes to further destruction of their joints!
Additionally, NSAIDs have been shown to interfere with patients' sleep patterns. One study of 37 male and female subjects at the sleep laboratory at Bowling Green State University in Ohio demonstrated that aspirin and ibuprofen, in comparison to a placebo, increased the number of awakenings and the percentage of time spent awake. The drugs also decreased sleep efficiency, and delayed the onset of the deeper stages of sleep.(8)
Even insulin secretion is affected by NSAIDs. Neonatal rat pancreatic cells were examined partly to determine the effects of insulin secretion caused by prostaglandin E (PGE) and drugs that inhibit its synthesis-i.e. NSAIDs. Two NSAIDs, sodium salicylate (aspirin) and ibuprofen, at drug concentrations similar to those achieved therapeutically in humans, inhibited PGE synthesis up to 70-80 percent. Augmented insulin secretion accompanied the PGE inhibition. Both drugs shifted the glucose-insulin response curves to the left at low glucose concentrations and augmented maximal insulin release at high glucose concentrations.(9)
Other NSAID-induced side effects include kidney damage, blood dyscrasias and cardiovascular effects, complication of antihypertensive therapies involving diuretics or beta-adrenoceptor blockade, and adverse effects in patients with heart failure and cirrhosis.(10) In one instance, a woman treated for rheumatoid arthritis with the NSAID sulindac developed gallstones composed of sulindac metabolites.(11)
Interestingly, NSAIDs have also induced adverse psychiatric reactions. Five psychiatric outpatients-two with major depressive disorders, one with a bipolar disorder, one with a schizophrenic disorder and one with an anxiety disorder-were treated with NSAIDs due to rheumatoid arthritis, osteoarthritis, or other painful neuromuscular conditions. All five patients developed moderate to severe depression. Three patients became paranoid, and four either attempted or considered suicide. These psychiatric symptoms disappeared once the patients stopped taking NSAIDs. When the patients re-started the drugs, the symptoms returned.(12)