There are three types of RNA involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribisomal RNA (rRNA). All three of these nucleic acids work together to produce a protein. The mRNA takes the genetic instructions from the nucleus to the cytoplasm, where the ribosomes are located.
Antidepressant medication tends to increase the concentration of central serotonin in the brain.
Antidepressants medications are drugs that are used to relieve symptoms of depression, anxiety disorders and other conditions. The concentration of central serotonin (a neurochemical) in the brain is increased to a dangerous level when antidepressant medications such as serotonin and norepinephrine reuptake inhibitors (SNRIs) or selective serotonin reuptake inhibitors (SSRIs) is used together with another antidepressant that also influences serotonin levels in the brain.
That's called a convex lens, as they converge.