An article about seasonal affective disorder, its causes and possible remedies, includes information from Dr. Alireza Amirsadri, psychiatrist and SAD specialist at the WSU School of Medicine. Anti-depressants work in 50-60 percent of people with the disorder, and light therapy is effective with up to 70 percent of patients, Amirsadri points out. Special fluorescent lights or counseling are other options, he and other experts agree.