Hi I am having a seeming allergic reaction or hives. No throat swelling or difficulty breathing. Just red, extremely itchy rash moving from inner thigh and waistband area to arm pits, collarbone then subsiding somewhat at initial sites but flaring up on hamstrings.
I have taken 25 mg of Diphendramine HCl but do not have anymore.
Can I take 180 mg of fexofenadine HCl? If so, how soon and how often?