Are Drowsiness and Lethargy the Same Thing?

The words “drowsiness” and “fatigue” are usually used interchangeably, but they differ significantly. While fatigue can refer to a feeling of tiredness or exhaustion due to illness or physical activity, drowsiness refers specifically to the state right before sleep.

Is lethargy the same as drowsiness?

Lethargy causes you to feel sleepy or fatigued and sluggish. This sluggishness may be physical or mental. People with these symptoms are described as lethargic. Lethargy can be related to an underlying physical or mental condition.

What is the feeling of drowsiness?

Drowsiness refers to feeling sleepy or tired, or being unable to keep your eyes open. Drowsiness, also called excess sleepiness, can be accompanied by lethargy, weakness, and lack of mental agility.