The advantage of modalert (generic name: modafinil) is it does little to your heart rate, small motor skills, blood pressure. Also, no euphoria. In short, it is like amphetamines, but without the amphetamine problems.
It is called “provigil” in the USA and is like $800 for 30 pills.
Fortunately, there is a related drug, called “adrafinil” that your liver breaks it down into modafinil and works exactly the same. (Because it is processed by your liver, you should not drink with it, nor should you use it for more than a couple months at a time.)
For whatever reason, adrafinil, is not a prescription drug in the USA and completely unregulated.
In fact, you can buy it on Amazon:
Both adraphinil and modafinil very well on ADHD, by the way.
All good info, and esp. the part about... not drinking alcohol with such a pro-drug (liver first pass), and to only use during short time periods.
Chemical habituation would get this noticed more. General public has no idea the kind of stressors our military ops people go through, and never a thought for what IDF is being put through year after year.