There were some doctors that left the prescription without offering any explanation at all; and he did not belong to that class either, which was, after all, the most vulgar.
Though he was felt to be extremely thorough, he was not uncomfortably theoretic, and if he sometimes explained matters rather more minutely than might seem of use to the patient, he never went so far (like some practitioners one has heard of) as to trust to the explanation alone, but always left behind him an inscrutable prescription.
There are no more uses of "prescribe" in the book.
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The doctor prescribed an antibiotic for the infection.
The doctor wrote a prescription for an antibiotic.