Pill Identification by Imprints: WPI 3631 Home Pill Identification by Imprints: WPI 3631 1 result HYDROMORPHONE HCL ER 32 MG TAB Side 1: WPI 3631 Color: White Side 2: Shape: Round Other Popular Drug Imprint VISTA 115 UL250 240 mg A-294 RX 900 1111 TOZAL G 171 L171 logo and Zenith 50 mg CP109 801 ML 37 logo 636 ZF 15 I4 A92 M367 A-263 M159 S 111 ZE 72 G 1540 EXELON 3 mg logo and 5034 cor 225 VASOTEC BI 6 NC 200 5030 INCY MC 32 COUMADIN 1 329 93 26 54 942 ORN 57 135 D10 P95