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 1258 227 or 292 54 302 SEROQUEL 25 I 15 K7 U30 1507 F 85 BCI 343 4467 MYLAN 5150 GS XJG L462 B 1 IP 304 WATSON 885 MCR 109 logo and 3090 84 UL500 J78 logo and 33 BL 06 LB2 MF 1 25 43 DDS 080 E 12 TCL347 VRX d p 54 746 A Z 212 or 279 RAM NL 575 086 54 373