A 12-year-old girl visits her physician for follow up after treatment with methotrexate for acute lymphoblastic leukemia. Stool analysis reveals blood

[Joyce]

#january2020usmle2k

A 12-year-old girl visits her physician for follow up after treatment with methotrexate for acute lymphoblastic leukemia. Stool analysis reveals blood in stool. Her platelet count is very low.

Which of these substances should be administered immediately?

A-Vitamin K
B-Leucovorin
C-Deferoxamine
D-Amitriptyline
E-Penicillamine

 

[Tiffany Wong]

A-Vitamin K