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 K 401 MYLAN 6897 POLY 730 23000UL GP 118 cor 134 NoDoz 93 215 FP 982 or 983 ML 33 V 50 par 020 HP 43 LAMICTAL 100 P3 691 ucb 500 MYLAN 5426 1048 E 801 CLOM 50 NVR EV 0079 A401 54 277 G 3721 VISMO M R 318 TCL347 51 30 N20 E 17 LAMICTAL 93 733 54 489 C42 Ortho or Ortho 535 E 13