poison
Toxicity is a general term for substances that cause discomfort to creatures. The effects of toxicants on organisms are varied depending on the type, and the type and degree of discomfort are different. In addition, for some organisms is toxic and for other biological non-toxic "selective toxicity" also exists in nature. For example, antibiotics are toxic to certain microorganisms, but are not harmless to other organisms. In addition the biological necessary for a variety of trace compounds, such as vitamins, minerals and other more than a certain amount will be toxic. For example, calcium is necessary for bone formation, but excessive calcium intake can damage the kidneys. In addition to acute or chronic toxic substances called "poison" in everyday life, there are substances that cause cancer or cause distortion. Extreme examples are such as thalidomide, which is a potent teratogenic substance but extremely toxic. The addition of other drugs to the organism poisoning, so that the impact of inhibition or chemical treatment known as detoxification. ...