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 573 S 369 037 SYNTHROID 022 RP 1.25 3 1 RENAGEL 400 1106 U36 D 27 E 27 NATCO or A45 or D 0.2 E73 A223 0374 b 972 1 mg M A7 MP 4 Mucinex b 96 EP112 Glaxo SB 4141 ZGNX 20 mg A4 TCL242 WW 62 497 AN057 L490 4214 AN 2 M 59 RIDAURA YS 01 CAR/RX CL60