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I found a white pill that is round white and it has an E and below the E is 44 and on back it has scorn line to make 4 pieces.
Call poison control, 1-800-222-1222
The pill you have is Tizanidine 4mg (generic Zanaflex) by Eon.
Imprint E 44 , white, round, double-scored.
There is an image at eonlabs.com
Info at http://tizanidine.drugs.com