BOTOX® is a prescription medicine that is injected into muscles and used to treat various conditions including to prevent headaches in adults with chronic migraine who have 15 or more days each month with headache lasting 4 or more hours each day in people 18 years or older. It is also used to treat increased muscle stiffness in elbow, wrist, and finger muscles in people 18 years and older with upper limb spasticity and treat the abnormal head position and neck pain that happens with cervical dystonia (CD) in people 16 years and older. BOTOX® Cosmetic is a prescription medicine that is injected into muscles and used to improve the look of moderate toseverefrown lines between the eyebrows (glabellar lines) in adults younger than 65 years of age for a short period of time (temporary).