Hello! My name is Jessica, I am a physician assistant, and one of the providers at Aesthetic Skin in Winnetka and Chicago. This is a great question. Botox and Dysport are both popular neuromodulators used to reduce the appearance of wrinkles and fine lines by temporarily paralyzing the muscles that cause them. Typically, the effects of these treatments last anywhere from three to six months, depending on various factors, including the individual's metabolism, the area treated, and the dosage used. While it is uncommon for Botox or Dysport to last over a year, there are instances where patients report extended effects beyond the typical duration. This can be influenced by several factors, such as the patient’s muscle strength, the precision of the injection technique, and the specific area treated. For some individuals, especially those who have been using neuromodulators regularly over time, the muscles may become less responsive, leading to a more prolonged effect. However, it's important to approach such cases with caution. The standard recommendation is to plan for maintenance treatments every three to six months to maintain optimal results. I hope this helps and best of luck!