Before receiving treatment with Xeomin, you should tell your doctor about all of your medical conditions, including whether you have a disease that affects your muscles and nerves, have allergies to any botulinum toxin product, or have experienced any side effects from any other botulinum toxin in the past. In addition, tell your doctor about your medical history and all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements. Especially tell your doctor if you have received any other botulinum toxin product in the last four months or in the past. Be sure your doctor knows exactly which product(s) you received and when you received them.