Prozac is a brand name medication containing the active ingredient Fluoxetine. It is a drug that belongs to the group of selective serotonin reuptake inhibitors. This drug affects chemical in brain that are either unbalanced or cause depression, pain and anxiety.
In laymen terms, Paradigm Shift is a popular, or perhaps, not so popular shift or transformation of the way we Humans perceive events, people, environment, and life altogether. It can be a national or international shift, and could have dramatic effects -- whether positive or negative-- on the way we live our lives today and in the future.
A functional shift is the process by which an existing word or form comes to be used with another grammatical function (often a different part of speech); an example of a functional shift would be the development of the noun commute from the verb commute.