Adderall is a brand-name pharmaceutical psychostimulant composed of mixed amphetamine salts. The drug is used primarily to treat attention-deficit hyperactivity disorder and narcolepsy. Adderall has also been used successfully to manage severe cases of treatment-resistant depression. Individuals who show little or no response to typical antidepressants--such as the SSRIs and tricyclics--are more likely to respond to psychostimulant therapy. These patients, however, are the exception, rather than the norm amongst depression patients.