I have been on 100mg of Zoloft and Xanax as needed for anxiety/panic/PTSD since Dec. 2008. Really havent had major side effects, except for the start... and this is typical. Now a week ago I was prescribed 500mg of Augmentin twice a day, for a very serious infection. And yes, for the first time in my life had a reaction.. rash, headache, nausia, dizziness, lump in my throat and a tight feeling around my throat. Could this be due to the new medications I am taking? I do have a lot of food and bug bite allergies. Thanks