<p>Very common undesirable effects are somnolence and weight gain. Besides increased appetite, elevated glucose levels, elevated triglyceride levels, dizziness, akathisia, Parkinson&#39;s disease, dyskinesia, orthostatic hypotension, mild and transient anticholinergic effects including constipation and dry mouth, asthenia, edema and photosensitivity reaction etc. may be observed.</p>