Is it permissible to combine prayers in the hospital due to severe fatigue and the presence of IV drips in the hand?

Combining the Dhuhr and Asr prayers, and the Maghrib and Isha prayers, at the time of one of them, is permissible for the sick according to many scholars, and there is no harm in it. As for combining all prayers at one time, this is a mistake and not permissible.