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 PLIVA LAN 1301 L 64 UL250 Nitro-Dur 0.6 mg/hr 7.5 21 G 54 489 C 25 D2/500 logo and 4358 TL 709 K 77 145 CIFEREX AR 787 logo and 2577 L468 C53 MYLAN 531 V 6 PAC20 CLA250 P201 CL9 logo and 2890 MYLAN 184 logo and 48 R 20 A01 Theo-24 100mg O C 24 logo 631 CPC logo and 123 PAD 0107 NATCO RTG-300 D 94