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 ML 57 U B855 TL 113 ARICEPT logo and TC L477 54 328 12 25 E 41 C134 BAC 20 HP 60 NORPACE CR 100 mg NAPROSYN 250 TN 1 RI 62 SCU2 C280 926 SJ GG 235 C75 West-ward 202 CCC 250 CTI 223 M 725 M366 RI1 PAR 867 ATON 705 A15 E 707 ZC46 P620 MARPLAN 10 par 290 VSP1 L417 RG 10