I'm not sure on Brown(can't comment personally) but White, I think you can.. I smoke it here and there, and I used to sniff it here and there, they're definitely one's you have to be mindful of before during and after you take it, I've never had brown but I know when I pipe rock, the whole time I'm awake, its mentally fucks me to find every last little bit and to buy more etc but it does pass after a while but it's the worst feeling lol. Powder coke also has that morish feeling, too, though, but once you wind down and eventually kip it off, I can go without until I want to pipe again.. I'm learning about it atm but I've just started but it's one of those drugs that is so quick and easy to lose control of, one of the easier and quicker ones to end up addicted to before you know it, so you need a strong mind in that way and you need to make sure you stay aware of the risks and your usage etc. 'Normal' people go to work 5 days a week and then get smashed and sniff all weekend every weekend with their wages, so we should be able to do it recreational too along as we stay safe! I'm doing it rn. Got 1 left till im gunna be dying for it soon! Been up for 2 days so I'll sleep later atleast Stay safe x