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 21 GG 822 .7 44 533 93 7385 F7 M450 S252 N logo KC H 49 MP 47 223 M E16 XR 50 HP 10 W 1031 CPC 76 678 MYLAN 216 GMZ G 21 MX 15 TZ 7 par 021 logo and 343 logo and 5710 SZ 203 AN 573 MYLAN 1200 CTI 142 SOMA 350 n 353 15 mg logo and 3060 MYLAN 6202 T 277 ZD18 Erymax 250 mg 708