First, I'd like to mention that I've been an IV black tar heroin user for ~15 yrs... and luckily I've never OD'd. And I have an extremely high natural tolerance to opioids so I use A LOT(~ 1 g/day right now, in individual IV shots of 0.2 - 0.3, just to keep me from being sick...I don't really get much euphoria, much less a high/rush, even though I guarante it's high quality, potent tar). So hopefully I won't end up OD'ing bc I usually use by myself w/ no one to give me narcan if something happens... fingers crossed). But the only reason I'm only using ~ 1 g/day right now is bc of financial limitations.... the majority of the time I've been using I would use 2 or 3 times that each day... and it's honestly been years since I've had a true "high/rush". I think my tolerance is SO high that I would have to use SO much tar to get a rush that I would pass out from the CNS depression b4 getting any euphoria/rush.... which is extremely dangerous for obvious reasons.
Secondly... I'm jealous that you acquired pure fent(I'm assuming you got powder from an online vendor?) But do you actually mean you made a nasal spray w/ "100mgs" of fent or do you mean 100mcgs? Bc I would be EXTREMELY careful using 100mgs of fent mixed into a solution. Most people would prob die if they did that(unless they mixed it with A LOT of liquid/water).
I was prescribed large amounts of fentanyl patches(two 100mcg/hr patches every 2 days + 6 - 8 8mg dilaudids/day) for about 10 years. I would IV 4 - 5 of the dilaudids at a time to get a moderate high. And I would use my fent patches buccally, which is one of my favorite ways to get high on opioids... it might even be my top/first choice. I LOVE the feeling of buccal fent and I would use up ~ 80% of the patch within 1 - 2 hrs.
So once again... I'm very jealous that you got a hold of pure fent. If I knew how to do that I would.
Stay safe!
jB