Pill Identification by Imprints: PZ4 Home Pill Identification by Imprints: PZ4 1 result PERPHENAZINE 4 MG TABLET Side 1: M Color: White Side 2: PZ4 Shape: Round Other Popular Drug Imprint U 137 325 E550 logo P291 logo and 073 W 516 GG 125 AZ 40 SC 800 720 1/2 419 VH1 L76 797 U7 RG M D9 292 or 293 G 421 SZ 985 West-ward 257 44 531 CL65 F 24 54 328 logo and 5240 MERRELL 37 SLC 222 par 218 54 987 logo and 665 93 2929 VP 381 b UPSHER-SMITH 0233 54 085 LZD GXL 10 558