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 WATSON 3210 NOVAST RDY610 ZE 36 44-491 or 44-466 E 50 SANDOZ 625 HLA 40 BCL 5 54 814 M MT IP 174 B 576 AN 515 SP G5 HP 18 AP 045 K 9 2355 West-ward 769 604 AN249 5136 NOVO 291 A/P 25 / 45 TAK ALG-25 81 KU LIDOCAINE PATCH 5% B168 LP79 AL 21 RP 700 RI1 logo SANDOZ 665 NxFE NP 5 EP 904 44 542