Possible minor side effects of Dysport include reaction or pain at the injection site, nausea, and/or headaches. There’s also the possibility that the medication may spread past the injection site. If this happens, the patient may experience loss of bladder control; hoarseness of voice; change or loss of voice; flu-like symptoms; double or blurred vision; neck/back pain; muscle weakness, pain, or stiffness; redness at injection site; temporary facial drooping; loss of strength, and/or breathing or swallowing problems. Dr. Maercks will discuss the possible side effects with each patient and create an individualized plan to minimize side effects and ensure optimal results.