Vitamin D and Methotrexate Adverse Effects

Since methotrexate toxicity represents a major problem in patients treating with cancer and there are few studies about the role of vitamin D in the pathogenesis of this toxicity, so the aim of the present study is investigation of the effect of vitamin D administration on methotrexate toxicity such as oral ulcerations, bone marrow toxicity as well as renal and hepatic toxicity also the role of inflammatory mediators and oxidative stress markers in methotrexate toxicity will be evaluated, taking in consideration the dose of leucovorin rescue.