Panacur is the same thing, no difference at all. When my rashes were everywhere and bad, I went through one in a week, mixed with 30 mg of cream.
[I just realized I've been saying "mg". Incorrect. "g" So 30 GRAMS of cream] :)
I don't know how well it would mix with zinc cream. I have the Walmart 40% and it's so thick you'd probably have a hard time. Shoppers also has "anti-itch cream" which is exactly the same as Benadryl cream. I find that it actually works a bit better than cortisone cream but is more expensive.
I haven't ordered the prazi yet. I decided to take a medication break when I was thinking about buying it.