Dating back to the 1890s use of sheep thyroid extract (to induce weight loss in euthyroid patients) resulted in reports of cardiac arrhythmias and death
In 1930s, 2,4‑dinitrophenol used for weight loss caused fatal hyperthermia, agranulocytosis and the development of cataracts.
In the 1950s, amphetamine use became popular, especially in combination with other mixed regimens such as diuretics, laxatives and thyroid hormone, but resulted in reports of serious MI and sudden deaths