The use of the word âprobablyâ in the sentence below indicates that the evidence is fairly strong. In the second sentence, the more tentative word âcouldâ was selected, indicating that the evidence is weak. The fire was probably caused by a fault in the engine temperature gauge.
There are several types of depression medications (antidepressants) used to treat depression and conditions that have depression as a component of the disease, such as bipolar disorder. These drugs improve symptoms of depression by increasing the availability of certain brain chemicals called neurotransmitters. It is believed that these brain chemicals can help regulate brain circuits that affect emotions. Major types of antidepressants include: 1  Tricyclic antidepressants (TCAs) are some of the first antidepressants used to treat depression.
In general, antidepressants work by inhibiting the reuptake of specific neurotransmitters, hence increasing their levels around the nerves within the brain, such as selective serotonin reuptake inhibitors (SSRIs), antidepressants that will affect serotonin levels in the brain.