Discovery that a potentially tainted drug is linked to 119 cases of meningitis nationwide has intensified debate among doctors about widespread use of the treatment to ease lower back pain, even though there is little evidence it offers patients long-term benefit. Use of the medication, a steroid injected near the spine to quell inflammation, has increased despite little evidence that it works. Doctors said that was in part because of the aging population and the relatively few risks of injections.
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