Known  quantity ingested: Give IV<unk>  1:1 with amount ingested, up to 5 grams
Unknown quantity ingested: 70mg/kg up to 5 gm (adult dose) 
Then give 1 gram IM q30min until total dose required reached
70mg/kg initial dose
Pyridoxine
Folic acid
Niacin
Thiamine
Leucovorin
Vitamin B12
Trientine
Hydroxocobalamin