Toxicity of Vincristine Combined With Posaconazole in Children With Acute Lymphoblastic Leukemia.

Background:Vincristine (VCR) is one of the main drugs of acute lymphoblastic leukemia (ALL) treatment. Azole antifungal medications are used for treatment or prophylaxis of invasive fungal infections in acute leukemia. Coadministration of these drugs increases the risk of VCR toxicity.Observations:We presented a girl with ALL using posaconazole prophylaxis. She developed VCR toxicity that included tubulopathy, high blood pressure, neuropathic pain, difficulty walking, diffuse muscular weakness, constipation, abdominal pain.Conclusions:There are limited data in children with ALL for posaconazole prophylaxis. We recommend that VCR side effects should be evaluated by careful monitoring of the patients who are on this combination therapy.