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 54 662 5mg APO 021 K LL 253 R 25 1 84 E 4 e5 112 West-ward 140 E 647 93 129 350 A94 LE 20 TV 10 93 308 6I IDT M60 ACTIQ 600 L 105 14/10 E71 G232 GLYBUR Lilly 2 GG 80 MP 772 U 137 PN Integra-F 342 L015 OS 302 F11 978 ALKA SELTZER Relagesic AX logo and EK