Pill Identification by Imprints: C 91 Home Pill Identification by Imprints: C 91 2 results RIVASTIGMINE 1.5 MG CAPSULE Side 1: C 91 Color: Yellow Side 2: Shape: Oblong RIVASTIGMINE 1.5 MG CAPSULE Side 1: C 91 Color: Yellow Side 2: Shape: Oblong Other Popular Drug Imprint RH MP 271 A223 M 45 N 100 E 117 T127 FENTANYL 100mcg/hr MYLAN logo and 069 N192 F 84 E 118 KEFLEX 250 mg M 28 Z 3926 Integra Plus G456 A402 510 74 ZE logo and 290 I 03 RDY MYLAN 3005 TCL003 C F C 73 L 3 TZD I 22 083 GG 531 Lilly 3233 G 2 AC APO 1000 logo and 3091 V403 54 731