Pill Identification by Imprints: HP 4 Home Pill Identification by Imprints: HP 4 3 results HYDRALAZINE 100 MG TABLET Side 1: HP 4 Color: Pink Side 2: Shape: Round HYDRALAZINE 100 MG TABLET Side 1: HP 4 Color: Pink Side 2: Shape: Round HYDRALAZINE 100 MG TABLET Side 1: HP 4 Color: Pink Side 2: Shape: Round Other Popular Drug Imprint DB02 ML ZC 26 VISMO 44 218 C7 A534 080 MARION 362 P2 E 221 54 125 REL900 5687 MONODOX 100 RX694 A94 MYLAN 6726 logo and 2577 I SZ 213 GAVISCON ESR 1174 CL 39 300 logo and 5029 TV U7 Caltrate L054 CAP T500 MYLAN QS 324 976 C84 FH 160 ZYRTEC BL L1 TV U1 CALCET L 36 INDERAL LA 80