Biochemistry is the study of how chemicals work involving things in this case (humans). Biochemistry emerged as a separate discipline when scientists combined biology with organic, inorganic, or physical chemistry. http://www.acs.org/content/acs/en/careers/whatchemistsdo/careers/biochemistry.htm/ Depression is a form of grief. When you don't care about anything or anyone. There are different types of medications that treat depression. Tricyclic antidepressants (TCAs) are some of the first antidepressants used to treat depression. They primarily affect the levels of two chemical messengers (neurotransmitters), norepinephrine and serotonin, in the brain. http://www.webmd.com/depression/symptoms-depressed-anxiety-12/antidepressantsA tricyclic antidepressant is a type of medicine created to help depression. It was first discovered in the early 1950s and subsequently introduced later in time. Tricyclic antidepressants get their name from their chemical structure, which contains three rings of atoms. This medicine is used to relieve depression. The 1950s saw the clinical introduction of the first two specifically antidepressant drugs: iproniazid, an oxidizing monoamine inhibitor used in the treatment of tuberculosis, and imipramine, the first drug in the tricyclic antidepressant family. . Iproniazid and imipramine have made two fundamental contributions to the development of psychiatry: one of a socio-health nature, consisting of an authentic change in the psychiatric care of depressed patients; and the other of a purely pharmacological nature, since these agents have constituted an indispensable research tool for neurobiology and psychopharmacology, allowing, among other things, to postulate the first etiopathogenic hypothesis...... half of the article. .... . eventually death, suicidal thoughts, and perhaps even thoughts that turn into actions. I think TCA was a great invention that will help so many people in the future. This medicine is necessary in some cases depending on the severity of the person struggling with depression. The medicine for depression TCA affects people today in a positive way. He is showing people that there is a way to help with the disease of depression. It is giving hope to those who thought there was no cure. TCA doesn't take it away forever, it helps temporarily. Following the instructions provided by your doctor. Help people carry on with their lives knowing they have this medicine to help them in their time of need. This medicine has helped people reduce symptoms such as sadness, loneliness, feelings of hopelessness and lack of energy. TCA Depression Medicine is a great way to help with depression cravings.