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 S8 N 25 G 31 ELN 30 ibr RP 106 M2A4 57344 E 799 P30 Butrans 5mcg/hour 239 FR MUTUAL 401 West-ward 25 MYLAN 3205 SL 50 ELP 2 1/2 SZ 198 A 51 GG 337 B 01 CL11 MERRELL 277 ZC56 PC20 WATSON 444 L9CZ 5 TL 127 ZGNX 50 mg A5 HP 11 109 Tiazac 360 AAT 104 logo and 23 HP 362 N L 98 ZC 64