SSRI drugs are often used to treat depression. Depression is associated with low levels of serotonin, a chemical that acts on certain brain cells involved in thoughts and mood. Nerve cells in the brain constantly release and reabsorb the chemical serotonin. SSRIs reduce the rate of reabsorption, resulting in higher levels of serotonin in the brain.
From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.
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