Amitriptyline hydrochloride (Elavil^®) is a prescription drug used for the treatment of depression. Besides treating depression, amitriptyline is also used "off-label" to treat a number of other conditions, including ADHD, bulimia, and fibromyalgia. The medicine is also effective at helping people quit smoking. Amitriptyline comes in tablet form and is usually taken by mouth one to three times a day. Some of the factors that can affect the amitriptyline dosage your healthcare provider prescribes include your age, other medical conditions you may have, and other drugs you may be currently taking. There are six available strengths of amitriptyline, ranging from 10 mg to 150 mg. Several manufacturers of generic medications make a generic amitriptyline drug. However, the medicine's brand name version, which was sold as Elavil, is no longer manufactured.