<prompt> Treatment for methotrexate poisoningDietary folic acidNiacinFolinic acidBiotin  <response>: Methotrexate poisoning: The toxicity of Mtx cannot be overcome by folic acid, because it will not be conveed to the active coenzyme formdue to inhibition of DHFA reductase by Mtx Treatment:- Folinic acid N5 formyl THFA, cirovorum factor rapidly reverses the effects. Thymidine also counteracts Mtx toxicity. Ref:- kd tripathi; pg num:- 862 