Pill Identification by Imprints: M 1820 Home Pill Identification by Imprints: M 1820 1 result METHYLPHENIDATE ER 20 MG CAP Side 1: M 1820 Color: Medium Blue Side 2: 20 mg Shape: Oblong Other Popular Drug Imprint PARLODEL 2 1/2 L151 37 B 312 EC-NAPROSYN F7 FTY 0.25 mg ST 150 S21 TCL 131 SL 25 CL 206 MP 303 717 NL 4 RX125 logo and NS L521 n 356 CL N022 RI 5 beano G 421 391 WAR 2 1/2 93 3107 logo and 667 CLARITIN 10 86 297 231 SE 5 54 531 KLX L 299 W122 ELN 60 MYLAN 345 logo and 1004