Pill Identification by Imprints: S551 Home Pill Identification by Imprints: S551 2 results OLMESARTAN-HYDROCHLOROTHIAZIDE 20-12.5 MG TAB Side 1: S551 Color: Pink Side 2: Shape: Round OLMESARTAN-HYDROCHLOROTHIAZIDE 20-12.5 MG TAB Side 1: S551 Color: Pink Side 2: Shape: Round Other Popular Drug Imprint WATSON 933 93 900 T558 GX CE2 logo and 5306 PLIVA 333 3972 54 LEVOXYL C 2 1/2 SZ 290 U48 K 102 GG 64 M 138 Endo 602 CL7 M471 93 130 54 145 M2 E7 G 304 44 548 L 105 ML 59 974 FL 1.5 or FL 3 0027 V 40 ZA-44 080 ZYV S191 W 1034 deplin PLETAL 50 H011 MINOCYCLINE 50 Fentanyl 50 mcg/hr