Escitalopram is part of a class of drugs called selective serotonin reuptake inhibitors, or SSRIs for short. SSRIs act on a specific chemical within the brain known as serotonin. Serotonin is one of several chemicals used to send messages from one nerve cell to another.his is called reuptake.. Normally, this process works without any problems. But when the levels of serotonin become unbalanced, it can cause a variety of conditions, including depression. Escitalopram helps to block the reuptake of serotonin so that more remains in the space between the brain's nerve cells.
DEFINITION of 'Non-Negotiable'. 1. A term relating to the price of a good or security which is firmly established and cannot be adjusted. 2.A term relating to a good or security whose ownership is not easily transferable from one party to another. term relating to the price of a good or security which is firmly established and cannot be adjusted. 2. A term relating to a good or security whose ownership is not easily transferable from one party to another.
(June 2010) Non-repudiation refers to a state of affairs where the author of a statement will not be able to successfully challenge the authorship of the statement or validity of an associated contract. The term is often seen in a legal setting wherein the authenticity of a signature is being challenged. In such an instance, the authenticity is being repudiated.