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 RD 53 3 1 logo and 5711 m 156 logo and TD 852 SZ 201 RH37 Z logo and LD ap and logo 550 CL 025 L368 GX CE5 P019 RDY 664 I 16 A 13 NEURONTIN 600 ZD18 ucb 1000 IP 195 316 or 317 R 346 U 400 U 129 par 028 H152 FP 54 150 G23 E 53 APO 019 M B4 93 4067 X ZL 2 Watson 369 cor 131