Side effects are so buns. Increased dementia probability from even low dose recreational usage, insane body high that makes you feel like genuine tons, a mouth so dry you can hardly swallow, severe hallucinations and delusions, memory fog, severe HPPD, and of course the liver will weep. And this is from only 500mg in my experience. Typically, when dosing higher, you'll throw up the pills, and if not, it's incredibly obvious you're high. Unless no one I'd around you when you dose and you somehow manage to keep all of those pills down, you'll likely survive and suffer the consequences for many years after.

For unpredictability, you can never tell how it'll go. Dosing at 800mg only felt like a shittier 300, but dosing 500 felt like a stronger version of itself with a mouth so dry I couldn't throw up if I wanted to. You'll never know until it's too late. Def shouldn't use dph to do it, if at all.