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 5513 PX A602 par 217 201 or 271 U29 538 KU 260 CP 106 454 WP 0320 IP 179 CIS 28 PA 916 MYLAN 5100 MPC 500 V348 370 EP 136 ANI 511 SANDOZ 572 49 25 41 APO 133 AMBI 445 GILEAD 10 44 453 A~ Logo and Z+ or M+ M 447 dp Integra-F Z 66 logo and NK PARLODEL 5 mg W 716 7.5 S 121 ucb 1000