Suggest Treatment For Sleeplessness In A Patient With Parkinson's Disease

My father is suffering from parkinsoniensfor the past 11 yrs he is on syncapone TDS selgin OD qutipine BD.....He has trouble sleeping at night he is overly anxious &demanding at night &wants constant turning of sides or adjustment of covers as he is unable to do this himself . Can he be given some sleep inducing pill to make him comfortable at night ?