I applied permethrin an hour ago. It soothed the itching and the hives I have from an allergic reaction to another medication. May I apply calamine or?

I would avoid it. I find calamine would be excessively drying & may add to your itching problem. AA cool compress applied to the more irritated areas can quell itching & a thin layer of 1% hydrocortisone cream may reduce the irritation.