>>12936418Modafinil is a wakefulness-promoting stimulant. If you're looking for a drug to not be tired, that's what you're looking for. From what we know about it, it seems safe and efficacious. I don't know much about whether there's any tolerance buildup. There are other drugs in the same family like adrafinil that you might want to look into.
Make sure you get enough sleep obviously. Stop drinking coffee, because (depending on the amount you drink, time of day, your individual metabolism, and other factors) it may negatively impact your sleep quality even hours after you stop feeling the effects.
If there is no explanation why you're tired, go see a doctor before asking 4chan. Also, you might have sleep apnea.