Understanding What is 556 drug?: A Guide to Pill Identification by Imprint Codes
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4 min read
The Food and Drug Administration (FDA) requires nearly all prescription and over-the-counter pills to have a unique imprint code for identification. The seemingly straightforward question, "What is 556 drug?" highlights the crucial fact that a single number like "556" does not identify one specific medication, but rather several distinct drugs distinguished by their shape, color, and other details.
