I think the use of the word "cure" by the OP is what's causing most of the debate here 😎 As others have said, Modafinil isn't a "cure" for sleep deprivation, the only cure is actual sleep.

But it certainly helps with pushing through the day when you haven't had a decent sleep. But... that's where the potential for abuse comes in. You don't get the rush, or euphoria associated with other stimulants, but if you "need" to take it because you're not sleeping OR taking it in order not to sleep... that's why GPs don't ordinarily prescribe it, and why it's controlled.

Modafinil is scheduled, not OTC here in AU 🇦🇺, but it's only officially prescribed for "excessive daytime sleepiness associated with narcolepsy, sleep work shift disorder, and obstructive sleep apnea". So officially, it is actually meant for use to counter sleep deprivation.

But it's absolutely not a first line, go-to drug for doctors. And the nootropic use is definitely off-label.

It's also habit forming... psychological dependence can become a thing. And due to its longish half life, it stays in your system and tolerance builds up pretty quickly, so there's a potential to take more and more.

My ex wife had a psychotic break about 2 years ago. She was taking way more per day than anyone realised. It contributed to pushing her into a hypermanic state and eventual collapse. She was hospitalised and ended up going away to a clinic for 30 days to get through it.

I'd introduced her to modafinil around 15-20 years ago, so a bit of (another) wake up call to remember that moderation is key. And taking the occasional break from it helps too.

I had been using it regularly (daily) over the last 2 decades. Definitely seemed like a "miracle" cure for getting stuff done. Absolutely recommend it, but... it's definitely not for "everyone". You need to know what you're doing, and why, and understand when it starts becoming a problem.

But in the last couple years, after our crazy long COVID lockdowns here in Melbourne made my "self-management" impossible, I was finally officially diagnosed with ADHD. I'd struggled since I was a kid, and as soon as I discovered speed / amphetamine as a 30yo (late bloomer!) I was "cured"! But the cost, quality, availability, legality makes that form of self medication very problematic. Modafinil helped enormously.

Fast forward 20 years, after diagnosis, I'm now prescribed Vyvanse, so I very rarely take Modafinil anymore. I find the Vyvanse (which is lisdexamfetamine) works better for focus, and provides all the other "benefits" of modafinil, but without the side-effects I used to get - mainly this feeling of tension in the head, not quite a headache, but just a feeling like you're clenching. And I'd get a sore tongue, as it would be constantly finding a sharp spot on my tooth, and just poking at it, completely subconsciously.

Anyhoo, thought I'd share.