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 UPSHER-SMITH 0225 2103 V 54 043 37 46 L424 L873 RX 553 975 CP 333 EZ FE 44 157 832 BM2 LE 20 West-ward 261 ZGNX 50 mg 54 888 265 C371 HP 227 C 735 CF H 106 1345 PRIMA logo and 3092 475 5897 U 89 B528 1253 C7 VP302 93/7441 P212 12 or 13 or 14 or 11 38AV logo and 43 792 626 IP 10