Which Pill Is Marked "IP 190"?

By Staff WriterLast Updated Mar 25, 2020 11:02:13 AM ET
pill-marked-ip-190
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The serial designation "IP 190" is stamped on 500-milligram oral tablets of naproxen. Naproxen is prescribed for humans for the treatment of chronic back pain and a number of other conditions and works by reducing inflammation.

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Naproxen is available in various dosage levels, but these have different stampings. IP189, for example, is stamped on the 375-milligram tablet. The drug is not classed as a controlled substance as its mechanism for action is as a nonsteroidal cyclooxygenase inhibitor, rather than as a narcotic or other drug with a high potential for abuse. Though pills can usually be identified by their stampings, any pill of unknown composition or origin should be safely disposed of rather than ingested.