My Husband Is 85, And Always Had Trouble Sleeping. Now

My husband is 85, and always had trouble sleeping. Now he sleeps about 9 hrs @ night, then naps for an hour or so, 2 or 4 times a day. His last 6th month check-up on April 1st found no problems, and Dr. is not concerned about new sleep pattern. He takes 5 mg Melatonin before bedtime, no sleep Rx, 10 mg. simvastatin; 10 mg Lipitor; .0375 mg Hyoscyamin (for bladder); and 325 mg aspirin daily. Should I be worried?