"prescribed it" is correct and usable in written English.
You can use it when you are talking about someone who has ordered something or given their opinion. For example: "The doctor prescribed it to me to take every day."
Have you always prescribed it?
The doctor(s) who prescribed it?
But English doctors prescribed it with abandon.
"He had never prescribed it before," she said.
It was legal so my doctor prescribed it.
Doctors prescribed it for asthma, typhus, malaria, worms, menstrual cramps, and other disorders.
That means there should be a paper trail stating who prescribed it and when.
The doctor prescribed it without seeing him or even talking to him.
In Chongqing, even prisons are holding singalongs, and one psychiatric hospital has prescribed it for patients.
Galea has acknowledged that he uses human growth hormone and has prescribed it to some patients.
Apparently, bimatoprost stimulates lash growth; opthalmologists who prescribed it for glaucoma noticed that their patients began growing long, silky lashes.
