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 54 013 cor 160 360 553 555 VASERETIC I62 WW 176 logo and 1000-20 DS or DP PA 916 1250 BRX 0.25 E700 DIAMOX 754 I 50 SP2 T 10 316 69 IP 203 M 625 AP212 93 175 O15 OP100 A5 Fentanyl 50 mcg/hr N L MINIPRESS M D11 T3 HP 531 A 325 PLIVA GS LHF 75 mg 301 logo and S10 1000 M M P9 FENTANYL 200