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 T 18 PH 044 H 149 W-7 10 mg and 3513 NCH 0820 P62 93 948 10 or 20 EP 906 US 14 WATSON 415 TARO 56 SB 4140 O AK KU 119 KLX WP 5901 WATSON 453 ROBAXIN 500 WW969 METHADOSE 40 INCY 4 9 10 or 20 or 40 M 444 P U PLIVA 327 023 ALV 317 N021 MD 54 960 736 G221 LILLY 4115 RX3341 logo and 81 CYP