Frown lines form when facial expressions are made as the muscle under the skin contracts. Over time, as your skin ages, these repeated expressions cause lasting frown lines. Neurotoxins, such as Xeomin®, are prescription medications that block the release of chemicals that cause these muscles to contract so frown lines are softened. If you are experiencing wrinkles, folds, or other moderate-to-severe concerns caused by excessively dynamic muscles, Xeomin® is the ideal solution for you. Unlike other injectable muscle relaxants, the results of this treatment last between four and six months. This is up to three times longer than the alternatives.