Insomnia is a long-term difficulty that affects your sleep. You feel more sleepy during the daytime but have disturbed night-time sleep. You can also have nap attacks where you fall asleep at improper times during the day.

 

 Modafinil works by animating the central nervous system to improve your alertness and reduce unnecessary sleepiness during the day.  The substance present brings alertness through boosting cognitive function.  So you can buy modafinil 200mg to to stay awake all day.