I am a laymen, but was under the impression our body changes serotonin into melotonin at night, so we can sleep. Could you be overdoing the AD, to the point, you still have too much unchanged serotonin to sleep? In the mornings we need coffee, a stimulant while our body converts melotonin back to serotonin, so we can go again.
Serotonin increases our desire for activity, as well as giving us a feeling of well being.
An SRRI antidepressant lowers testosterone blood levels and
lessens libido.
hugs david