I personally know of one person who used to "blackout" sort of... except it wasn't a blackout. It was the weirdest thing, he'd be doing something and all of a sudden he'd just freeze. It was rare, but it happened. Like if he was getting a drink, he'd just freeze with the cup in his hand and the faucet running and wake up an unpredictable amount of time later with no memory of the period between. And an overflowing sink...That was a cocaine addict. I read about a meth addict who at least once experienced the same phenomenon. Other than that, no, I've never heard of this happening ever to anyone else anywhere.If your doctor doesn't write you prescriptions regularly, TELL HIM YOU USE DRUGS. Tell him what drugs and how much of them, and be honest about it. If he'd stop prescribing something that you want him to keep prescribing though... obviously that's a different situation. But he doesn't give a fuck what you take, as far as he's concerned you're a lump with a problem that you're asking him to fix. He's not there to babysit you.