Despite thirteen hours of sleep I looked and felt drowsy.

Do not drive or operate heavy equipment when you feel drowsy.

She felt drowsy, as if it were too much trouble to move.

By his account, one night he felt drowsy and went to lay down in bed.

Suddenly, they all fall under a spell which makes them feel drowsy.

You also may feel sleepy or drowsy during the day.

If you consistently feel drowsy during the day, talk to your doctor.

She felt drowsy and peaceful with the arrival of night.

I noticed lots of people are saying it makes them feel drowsy throughout the following day as well.

It was intensely hot in the radio room and I began to feel drowsy.