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 logo and EK alza 36 Z 71 ucb 250 93 7373 ER 2 1008 0.75 P 60 585 Lilly 3234 B 3 5 7 L 179 Eisai CL 5 52 44 375 EL510 PH051 LCI 1354 R 10 PC20 8119 logo and 48 P ALTACE 10 mg SU 37 44 FX 75 740 MP 578 OMEGA-RX T011 logo and 571 IL 3583 AT 262 54 107 122 MP 26