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 EP 121 G 4960 INDERAL LA 80 326 BCM 50 SZ 659 WPI 3508 G 31 F 84 0631 50mg 1034 5684 S 5 Z310 10 mg MYLAN 6202 2355 RSV 5 FR32 EC-NAPROSYN Lilly 3238 GG 451 U7 RP105 127 SP2 ALKA SELTZER EX S logo and 2779 MF 2 P 75 1/8 LBH 20 mg ZC 25 258 ZA-46 E 137 ACTIQ CORTEF 10 barr 200 mg BL 06 CPC 490