Pill Identification by Imprints: RI91 Home Pill Identification by Imprints: RI91 2 results MINOCYCLINE HCL 100 MG TABLET Side 1: RI91 Color: Yellow Side 2: Shape: Oval MINOCYCLINE HCL 100 MG TABLET Side 1: RI91 Color: Yellow Side 2: Shape: Oval Other Popular Drug Imprint G 55 54 199 ER 2 BP 814 PD 157 MPC 600 Theo-24 400 mg BMS 1964 TYLENOL 160 TMC PD 237 WPI 900 RI19 GG 85 SZ441 LAN 1050 K4 SZ 344 CL 5 DILANTIN 2102 barr 30 mg BA 300 AN 512 HP 17 ZC40 609 M 38 M 530 A538 R 127 080 B198 MYLAN 6380 M C3 AN 55 IP 305 ZD 20 N SJ 646