Glonoinum, or glyceryl trinitrate, is a colorless, oily, toxic liquid. It was discovered by an Italian chemist, A. Sobrero, in 1846. In 1867 the Swedish scientist, Alfred Nobel, added kieselguhr to it to produce dynamite, which is one of the most powerful explosives known. Glyceryl trinitrate has a potent effect on the circulation and is used in orthodox medicine to treat angina. This remedy is mainly used for complaints, such as heatstroke, that involve the nervous control of the circulation to the head and heart. Symptoms include sudden flashes of heat due to increased blood circulation, which flow upward to the head. There is a feeling of fullness and a bursting pain in the head, which the sufferer tries to stop by squeezing the head. The remedy is also used for heat exhaustion and the onset of heatstroke.