Clinical trial, with positive findings, on 50 patients with accumulation of heavy fluid in the trachea (windpipe) in an Intensive Care Unit at a university hospital in Austria. Approximately half of the patients were randomly allocated to receive a homeopathic medicine called Potassium dichromate; the others received a dummy medicine (placebo). They did not know which treatment group they were in. After 2 days, there was less accumulation of heavy fluid in the windpipe of patients who received homeopathic treatment than in those who received placebo.