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 B 566 ZOMIG 2.5 174 LILLY 3251 L 230 P 2 GG 540 703 F 24 E 44 A 17 W 924 LL 721 A10 DAN 44-466 KU 106 IP 103 8 DCI TL600 W 923 MYLAN 7096 XTAMPZA ER PX 2 W962 5030 440 HP65 303 351 NT or EP or E DS or DP MP 20 20LA NOVO 288 RTG-200 APO TI-2 835 AAT 052 GG 450