
Somnolent
Feeling Drained
Use 'somnolent' when describing a person who is so tired they're almost in a state of sleepiness. 
Before Bedtime
'Somnolent' is often used when someone is winding down before sleep, not just tired from activity. 
Not Negative
Being described as 'somnolent' isn't bad; it's a natural state of needing rest. 