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 TL051 ALTACE 10 mg D15 139 ZE 71 M 1860 logo and 672 Y 42 VIP102 398 E 149 404 A-P 1 523 CB7 O M164 T 10 WW 27 T/255 TL601 ASPIRIN -L- barr 24 mg 7.5/325 RP 1.25 R179 677 H22 M72 Nitroglycerin 0.6 mg/hr MAXIPHEN DM POTABA 51 166 UPSHER-SMITH 0230 511 E 50 A533 GG 21 Vivotif L145