Usually : Usually when people are vomiting black stuff, they are vomiting blood. With a history of leukemia and an episode that was probably a faint with some seizure-like movements what comes to mind is a GI bleed with fainting from anemia. Your friend should get to a doctor fast.
Answered 12/30/2018
5.3k views
Agree with Dr. D: Vomiting black stuff is serious even without a history of leukemia and doubly so with the health history of your friend. He ought to see a doctor or go to the emergency room of a nearby hospital.
Answered 1/8/2019
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