Hi [...],
1. A direct taper from Ativan is possible but given you're already dosing 6 times a day I can see where this could be challenging for you, you're already dealing with interdose so tapering could exacerbate this situation.
2. For you, given your sensitivity I would suggest a crossover, Diazepam of course is the gold standard but I'm not sure if its the right fit for you given your histamine issues, have you ever taken it before?
2.1 I'd like to ask about your attempt to cross over to Klonopin, since it's twice as strong as Ativan, I'm wondering what you mean about "straight switch"?