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 F 75 NEORAL 100mg GX EG2 3671 HP45 1004 R789 UL500 U MYLAN 5150 L2U4 SUN808 ZF 14 PH 063 C 200 ucb 750 KU 181 P113 HPC 200 E 138 CP 401 G 2 54 948 alza 18 Y 08 cor 187 1343 G 300 mg 271 RG87 CA 1313 MP 66 B-635 4 mg MP 8 INT EXELON 4.5 mg APO 018 N L