Why does modalert 200 make me feel so good?

https://www.smartfinil.net/product/modalert-200/

Modafinil can make you feel "good" because it affects the brain's dopamine, orexin, and histamine systems, increasing alertness and mental vigor. Normal weariness vanishes as a result of the reduction of sleep pressure and exhaustion. Improved motivation, confidence, and mood can result from this.