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 C C U02 P58 NT or EP AP205 LILLY 4420 ITR 022 M 15 129 BMS 200mg AN 755 M3 U3761 0631 50mg EVOXAC U7 G 3718 H125 44 447 54 036 AN 553 T1 or T2 or T3 or P 1157 GX 623 NL 712 I ZA-17 L462 SZ 203 A66 P20 CL 042 A4 54 775 ADL 2698 V2 logo and 2908 PX 1 RCC GPE