Not only is it safe to use Modafinil daily (it’s FDA approved for daily use at 50, 100, or 200mg / day), there are patients who’ve used it for over 20 years with no negative effects. No one has ever been harmed (other than by sleep loss) even at doses up to 10,000 mg (suicide attempt).
If anything, all signs (and literally 100+ studies) show it enhances function and protects the brain, even preserving brain function in cases of stroke and traumatic injury to brain tissue. More relevantly, it protects the brain against cumulative oxidative damage (aka aging) from stress, sleep loss, and other sources like AAS use.
Provigil = Modafinil
Nuvigil = Armodafinil
View: https://youtu.be/PAKS0aVhGto
View: https://youtube.com/shorts/c446afqoC78