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 C148 M77 T1 150 CL 205 L200 CD DAN 150 TL614 8311 E150 MSD 275 MEDA 518 WRF 7 1/2 M 221 M202 P 2.5 R531 44 382 Relagesic 139 ZYLOPRIM 300 logo and 7 CYP 870 A 37 93 3123 E 39 WATSON 3208 44 198 EXELON 3 mg 468 PLIVA 334 21 or 18 M 64 RD27 M R cor 230 MONODOX 75 CTN 555