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 barr 180 mg 54 337 M U12 L 20 MP 46 GS EUG 225 44-466 Shire barr 400 mg G 3721 T 191 GG 335 ZE66 MYLAN 2537 M07 6.0 601 P-O ZA23 L054 XR 50 or XR 200 or XR 300 862 555 606 LL255 CL 77 ROCHE 838 TL 216 B854 307 TL049 MEL 15 P U N S1 FS IP 219 EK 25 n 358 BRX 1 MYLAN 162 15 XL