Pill Identification by Imprints: M 1840 Home Pill Identification by Imprints: M 1840 1 result METHYLPHENIDATE ER 40 MG CAP Side 1: M 1840 Color: Yellow Side 2: 40 mg Shape: Oblong Other Popular Drug Imprint Advil 100 logo and 256 C81 M V5 44 235 42 16 V 801 SG 175 4810 EN1 200 FE1 cpc43 500 500 M 745 D 87 KU E61 MYLAN TM 140 41 NTBC 10 mg NL 771 RE 76 U 135 J94 M 515 GG C9 CYP 193 barr 808 IRESSA 250 MEDROL 2 ZA-36 LOR 10 AN 323 C181 ADIPEX-P 37.5 L-2 SUSTIVA AA 13 M 355