A 33-year-old man was found in a state of cardiopulmonary arrest. He was transported to an emergency hospital but was pronounced dead. He had suffered from depression for about 8 years and had attempted suicide repeatedly. A search by the police found 645 empty Press Through Package (PTP) sheets. They had included neuroleptics, antidepressants, hypnotics, proprietary antitussives containing caffeine, proprietary cold remedies containing caffeine, and other unidentified drugs. An autopsy showed higher rectal temperature (38 degrees C), severe pulmonary edema (left: 681 g, right: 821 g), and a large amount of urine in the bladder (about 760 mL). Toxicological analyses using gas chromatography-mass spectrometry (GC/MS) and high performance liquid chromatography (HPLC) demonstrated that doses of clomipramine hydrochloride (a tricyclic antidepressant), chlorpromazine (a phenothiazine), and caffeine (a methylxanthine derivative) were within the toxic range (0.68, 0.64, and 34.24 [microg/mL], respectively). Histological examination showed centrilobular necrosis of the liver with small fat droplets. We concluded that he had died of pulmonary edema due to combined drug intoxication including proprietary antitussives and cold remedies. Furthermore, there was a strong possibility that he had habitually taken overdoses of those drugs. Herein, the risk of misuse of prescribed and proprietary drugs, especially for people with psychological problems, should be reemphasized.