Pill Identification by Imprints: GP400 Home Pill Identification by Imprints: GP400 5 results MAGNESIUM OXIDE 400 MG TABLET Side 1: GP400 Color: White Side 2: Shape: Round MAGNESIUM OXIDE 400 MG TABLET Side 1: GP400 Color: White Side 2: Shape: Round MAGNESIUM OXIDE 400 MG TABLET Side 1: GP400 Color: White Side 2: Shape: Round MAGNESIUM-OXIDE 400 MG TABLET Side 1: GP400 Color: White Side 2: Shape: Round MAGNESIUM-OXIDE 400 MG TABLET Side 1: GP400 Color: White Side 2: Shape: Round Other Popular Drug Imprint RESPA 177 ML 31 2101 44 235 MYLAN 210 Ocuvel G222 VEM EP 135 WPI 3635 MYSOLINE 50 BL 07 Phillips TA1M 644 B082 J63 WPI 3720 RX905 logo and 2588 Y CL 555 E 10 RI4 H10/325 logo and 502 M MC1 1 8 93 7350 Tiazac 420 V M 0 17 TI R12 logo TG W 111 E 134 N 100 A 44