Most of this is actually categorized as depression. Whilst medication is wonderful for some things, it doesn't directly stop the majority of symptoms for depression. Whilst this may sound strange, you actually need to force them up and out of bed, make them have a shower, have a coffee if they do that as part of their day, then make them go for a 5, 10 or 20 minute walk or exercise. Make them do more exercise in the afternoon if needed, even though they feel tired, it will actually reignite the bodies natural defences and efficiency to continue on again. Depression is the cause of what your seeing primarily.