I understand your concern towards your father. It is unclear for what kind of restlessness he is taking psychiatric medicines. The reason for his insomnia needs to be evaluated. However it is easily manageable with appropriate treatment. Some counselling sessions along with medical help might be useful for him. I suggest you discuss with his psychiatrist regarding the issue. I would also be more than happy to help you with that if you are looking for online assistance or second opinion. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is also available.