<p>Trihexyphenidyl Hydrochloride is indicated as an adjunct treatment of all forms of parkinsonism (postencephalitic, arteriosclerotic &amp; idiopathic). Additionally, it is indicated for the control of extrapyramidal disorders caused by central nervous system drugs such as dibenzoxazepines, phenothiazines, thioxanthenes &amp; butyrophenones.</p>