Zithromax - Does zuthromax contain sulfur?

It is not sulfer that most people are allergic to with antibiotics. It is sulfa which is short for a group of the first antibiotics made called sulfonomides-sulfa drugs for short.

I was just put on this and wow am I feeling sick as a dog bc of it. I just really feel sick to my stomach I have a sulfate allergy and this is usually how I get. Now I'm wondering what gives I just don't know. Dumbfounded