my Father will turn 78 this month. He has been exceptionally tired recently. He had a kidney removed about 6 years ago & takes a large number of meds including for blood pressure cholesterol &Prozac. Anyway last night he slept 10hours & yet is so tired this evening that he is going to bed 2 hours earlier than last night complaining of not feeling good & being overly tired. Just wonder if I should be concerned?