Clinical trial, with positive findings,  on 55 patients with depression who were treated in an outpatient clinic  in Brazil. Approximately half of the patients were randomly allocated to  receive homeopathic medicine and the others received Prozac; they were  not told which treatment group they were in. After 8 weeks of treatment,  there was no difference in symptoms between the two treatment groups,  showing that homeopathy and Prozac were similarly effective in the  treatment of depression. A higher percentage of patients treated with  Prozac reported troublesome side effects.

PubMed Link