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The man, from the Northwich area, was refused access to the hospital where his son is being cared for.
The High Court in London was told the father made a series of abusive telephone calls to doctors and wrote a thoroughly unpleasant letter to the hospital.
Lawyers for the distraught parent argued the ban imposed by the NHS Trust, which runs the hospital, was irrational and urged Mr Justice Collins to order that he be allowed to visit his son.
But the judge said the father did not have an arguable case and refused to open the way for a full judicial review of the Trust's stance.
The court heard the father believes medics are giving his son far too many drugs, which were having adverse side effects, but these concerns were said by the hospital to be ill founded.
The judge said the father had lost faith entirely with the doctors who were treating his son.
This resulted in a number of confrontations between him and medical staff, which culminated in the 'thoroughly abusive letter' sent by the father to the NHS trust.
As a result, he was banned from entering the hospital's mental health unit last November.
Mr Justice Collins said: "It is impossible to accept that so many people at the hospital have got it wrong.
"I have no doubt whatsoever that the exclusion is fully justified."
The court made an order banning the naming the father, son, hospital or the NHS Trust involved in the hearing.
Hospital visiting ban can stay, rules court
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