Mercuric chloride is a violent poison that was used in the 17th and 18th centuries as a local antiseptic. It is now used as a fungicidal dip to treat bulbs and tubers and in the chemical industry for plastics manufacture. lf swallowed, it causes death of the cells and burning pains in the throat and stomach. The remedy is used for ulcers, particularly if they affect the gut as in ulcerative colitis; where there is diarrhea with bleeding, and great straining to pass small amounts of mucus or blood. Similar urging, and possibly bleeding and discharge of mucus, occurs in the bladder. Merc. cor. is also given for ulcers associated with exhaustion, in the throat, mouth, and on the front of the eyes. Symptoms may include sharp pain in the back of the nose that extends out to the ears, excessive saliva, and it sensation that the teeth are loose.