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 785 F51 5904 V EL 14 MYLAN 1610 Tandem K0 Prenate 0031 V WPI 3631 C17 W 905 CP 405 TL 121 93 7300 RZT 200 ER R-264 E 648 K 29 POTABA 51 S12 4740 C-122 IP 78 GG 55 115 B084 Q21 PROCARDIA XL 60 JSP 544 APP 332 M 090 W 921 8117 WW969 Z 2083 AN 573 GG 450 BG-12 120 mg or BG-12 240 mg