I am having red rash on several parts of my body: forearms, thigh, and a little on my side. I'm 58 and have had allergy problems in the past, but never for any medical products. I've lived in Frederick MD for 28 years, and have had allergies to ragweed and pollen, but never anything else. The rash covers most of my forearms and itches a bit. The only thing "different" in the past week is that I had some dental work done (adding powered bone to my gums to build a better foundation for dental implants) last Friday (6/29) and the doctor prescribed a Amoxicillin. I read on the accompanying information sheet that it could cause a rash, so I stopped taking it on Monday, but I still had the rash yesterday and today.