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 SZ 657 OMEPRAZOLE 10 mg ZOVIRAX 800 AN293 VH2 E701 I 37 TUMS US 10 101 Vivotif Berna barr 8 mg WATSON 3551 UM Sandoz B 683 GP325 658 953 PX 4 ZC41 APTALIS 3 93 215 R179 TL 172 BRX 4 126 440 WATSON 415 PFIZER 399 753 S 12 WAR 2 PH051 A/P 12.5 / 45 logo and 324 ZYRTEC CY GPI A325 A 21