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 BR 174 U3761 MP 273 logo and S5 973 M N4 PX 2 54 199 CZ 25 A 38 S433 E42 DISTA 3105 CL 77 G 343 e5 110 EXH 12 Novel 660 AN 757 276 571 cor 160 M75 F11 M 125 ND2 195 C370 4853 V logo and 10 TL 173 PX MYLAN 2302 POT 10 ED PSE 42 16 V MYLAN 214 WC 800 052 M MT