Because that's what rifampin does.
How would you know that?
Yeah, we get your objection.  Foreman. Are you sure? That doesn't make any sense, check it again. We got to delay the venous sample. Why, her urine turning orange?
Yeah, we get your objection.  Foreman. Are you sure? That doesn't make any sense, check it again. We got to delay the venous sample. Why, her urine turning orange? [SEP] How would you know that? [SEP] Because that's what rifampin does.