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 MYLAN 351 813 MYLAN 6202 M4 GP T3 A272 logo and 15 WPI 6 A 117 logo and 2907 M 411 SV 572 E612 5 ML 34 NF5 WATSON 861 93 7436 44 428 M2A4 57344 L 232 logo and 804 TZD H22 5544 LCI 1318 156 logo and 3064 G 51 WATSON 795 U 129 b 98 UPSHER-SMITH 0226 TV AN 515 AN057 GG 438 34 ZC40 C 25