Just make sure your not too toxic before you start.
If so you may want to do some preperations like a cleansing diet of fruits vegetables nuts and seeds before hand. This just makes it easier to do the cleanse.
But otherwise you won't be going to the hospital because the lax tea and the SWF (Salt-Water-Flush) will keep you cleaned out.
Your friend , I'm sure didn't know about the SWF.
As far as doctors recommending this cleanse, - I wouldn't hold my breath waiting for it to happen.
They're not going to recommend it because its a natural cure, and they don't make money from those kind of things. Their only solutions are going to be drugs or surgery, - thats where the money is made.