Translation:Tienes que aumentar la dosis.
I answered as the above with Tú at the beginning. Why is that wrong?
I did the same. It should be accepted, so I have reported it.
Tiene que aumentar la dosis (marked wrong on 5/21/18)
Would "Necesitas aumentar la dosis" be an acceptable translation? Or is the translation of "have to" different in meaning from "need to".