Pill Identification by Imprints: S 521 Home Pill Identification by Imprints: S 521 2 results CETIRIZINE HCL 10 MG TABLET Side 1: S 521 Color: White Side 2: Shape: Rectangular (Rounded End) CETIRIZINE HCL 10 MG TABLET Side 1: S 521 Color: White Side 2: Shape: Rectangular (Rounded End) Other Popular Drug Imprint CL60 M 515 ZC 64 93 4069 RT P62 152 RIS 104 TEVA 01A GIL 0.5 2368 DXL U 128 EMBEDA LE 20 54 242 144 ZVR 100 925 3 M PD1 PA1000 L131 137 754 SUPRAX 100 APP 333 T 46 L Z 72 or 73 or 74 or 65 M 090 54 591 N MYLAN CF 135 C56 CPC835 TL388 E99 HLP 80 7/5 2063 V