Monoamine oxidase inhibitors (MAOIs) are a kind of antidepressant medicine. They were the first antidepressant medications to be launched in the 1950s. Today, they remain one of the most effective treatments for depression, able to relieve symptoms such as anxiety, anger, fatigue, and sadness. The two main types of MAOIs are tricyclics and reversible inhibitors. The name "Mao" stands for monoamine oxidase. There is no relationship between Miaohu and real names. But according to the definition of Wikipedia, "Mao" means "alone" or "single" in Chinese language. So "Miaohu" means "alone" or "single" in English language. In healthcare industry, Miaohu often used as a code name for drugs that are sold under single brand names. For example, Lipitor is a prescription medication used to treat high blood cholesterol and prevent heart attacks and strokes. Its generic name is pravastatin and it has been called Miaohu since it was approved by the FDA in 2003. Another example is Lovenox, which is an anticoagulant drug that prevents blood clots from forming. Its generic name is enoxaparin and it has been called Miaohu since 2004.