Pill Identification by Imprints: R31 Home Pill Identification by Imprints: R31 1 result MEFENAMIC ACID 250 MG CAPSULE Side 1: LU Color: Ivory Side 2: R31 Shape: Oblong Other Popular Drug Imprint Fentanyl 25 mcg/hr A CS U7 BMS 1964 CFZ GG 506 R150 457 CDT 254 M 444 CGPI 54 575 4212 RI 61 CNG1 logo and 805 PREVACID 30 or BRISTOL 7279 or KL PD 220 WPI 3510 X502 AMT G 240 LOVAZA AN 475 IP 304 A 43 188 LU NL 710 51 38 54 582 G 252 PREMPRO 0.45/1.5 P 20 V01 ECI MC 32 ZC55 N-P b 701