Pill Identification by Imprints: M 4 Home Pill Identification by Imprints: M 4 4 results METOPROLOL SUCC ER 200 MG TAB Side 1: M 4 Color: White Side 2: Shape: Oval METOPROLOL SUCC ER 200 MG TAB Side 1: M 4 Color: White Side 2: Shape: Oval METOPROLOL SUCC ER 200 MG TAB Side 1: M 4 Color: White Side 2: Shape: Oval METOPROLOL SUCC ER 200 MG TAB Side 1: M 4 Color: White Side 2: Shape: Oval Other Popular Drug Imprint FX100 H 008 L 105 DX West-ward 450 ER 2 N 5 ENL MYLAN CF 135 M A12 797 K 45 S903 392 TA2M 860 ZA-10 B 1 BMS 125 mg 93 5269 8 08 5126 V Fentanyl 50 mcg/hr SZ PBT Onset M0100 254 G 70 L898 IG 650 L133 V41 E 707 Endo 602 Z330 30 mg ER 5 381 b NT 50 N 40