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 logo and 88 COUMADIN 10 M 753 COB ZC40 E8 110 RN5 US 12 IDT O 5 P 25 F 72 HP 62 V240 IG272 L544 60 mg RX 526 B404 M605 737 IP 194 ZESTRIL 40 93 4068 TENCON 6468 FO 316 1343 438 logo and A1 PFIZER 399 0 8 ML 86 CL 38 200 U-S 42 0.5MG WATSON 892 or WATSON P C 13 5688