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 MYLAN 2047 367 299 U 168 E 11 93 318 logo and Pamelor 50 mg HLP 80 logo and 50 mg 1325 F52 LIMBREL 52006 7767 Endo 602 alg Lopid ZC17 E712 H H ETO 200 MG 54 242 AP 84 2083 V N P U24 PP IP 303 N 344 MYLAN 6899 MYLAN 8200 M BU1 TL508 1 8 M605 174 EK 25 YB ZD 22 INDERAL XL 559