Pill Identification by Imprints: M 1820 Home Pill Identification by Imprints: M 1820 1 result METHYLPHENIDATE ER 20 MG CAP Side 1: M 1820 Color: Medium Blue Side 2: 20 mg Shape: Oblong Other Popular Drug Imprint NATCO 4833M RI4 BL 325 OP 697 SOMA 350 R 158 or 54 312 or GG849 MYLAN 1258 E150 MX32 64 KPI 117 RN5 IG273 BVF 180 S 111 ID CXL 8 IP 465 U U 93 3125 AN 513 I 135 D 95 2 58 798 7663 M54 2130 TYLENOL PM 54 315 0631 50mg KU 107 F 1 logo and 115 54 447 logo and 76 RX124 MT3 HH210