1After a few days of not sleeping well, she felt lethargic and struggled to concentrate at work.
2Is the new medication causing you to feel lethargic, or is it just a side effect of the illness?
3The team's lethargic performance in the first half of the game made it difficult for them to catch up later.
4If you're feeling lethargic, try taking a short walk outside to get some fresh air and sunlight.
5The doctor warned that the patient might feel lethargic for a few days after the surgery, but this would be temporary.