Pill Identification by Imprints: M RN4 Home Pill Identification by Imprints: M RN4 0 results Nothing Found!!! Other Popular Drug Imprint SZ 201 C148 MX9 AN 55 M 134 878 UPSHER-SMITH 0085 ZANTAC 150 AX 403 HP 228 L 178 logo YC 31 81 E145 54 543 D 27 M 1840 riba 200 RTG-400 Y 46 124 PX 2 TCL 355 O23 5012 V CL 78 S5 logo and 78 240 44-502 fentanyl 800 mcg ADOXA KC 8 M4 RPR 202 753 IG274 241 1 FENTANYL 800 ZC46