The Role of Anti-Depressants
Many people believe that anti-depressants increase the amount of neurotransmitters in the brain that helps to improve mood because there was a shortage of neurotransmitters to begin with. We're not actually sure if this is true.
Anti depressants, particularly those such as Selective Serotonin Reuptake Inhibitors (SSRI) increase the amount of available serotonin in the brain which can decrease sensitivity and increase indifference. This means that things don't get under your skin so badly, which reduces irritability. Decreased sensitivity can also reduce anxiety, as you are less inclined to worry about stuff.
Other type of anti-depressants, called Selective Noradrenaline Reuptake Inhibitors (SNRI) work by increasing energy to help with motivation, However, if you have an agitated depression it can make things worse.
In the video above, Dr Al explains this in more detail