Amitriptyline is a medication primarily used to treat depression and certain types of pain. It belongs to a class of drugs known as tricyclic antidepressants, which work by balancing chemicals in the brain that affect mood and emotional state. Doctors may also prescribe it for conditions like anxiety, migraines, and fibromyalgia. This medication is usually taken in pill form, often at bedtime, to help minimize side effects like drowsiness. Common side effects can include dry mouth, weight gain, and constipation. It's important for patients to follow their doctor's instructions and discuss any concerns or side effects experienced while taking Amitriptyline.