Pill Identification by Imprints: M RN4 Home Pill Identification by Imprints: M RN4 0 results Nothing Found!!! Other Popular Drug Imprint 1 5 0 4 mg MYLAN G2 RD 72 G 3720 OS 303 B300 680 EP 130 n 356 536 1MG E712 M C4 SJ 646 SZ441 T 175 Motrin IB P40 M 125 S21 WPI 500 SDF 20 cardizem CD 300 mg PA2 31 80 logo and 290 M 753 P 2 A21 PC16 M 522 EL 14 650 L 239 C181 Nitroglycerin 0.4 mg/hr A/P 12.5 / 15 SB 4142 LAMICTAL XR 200