Final answer:
About 60 to 70% of people with depression experience some relief from SSRIs, but only 30 to 40% experience complete relief. SSRIs work by increasing serotonin levels in the brain, though effectiveness varies among individuals.
Step-by-step explanation:
On average, 60 to 70% of the people who experience symptoms associated with depression experience some relief when taking SSRIs, but only about 30 to 40% experience complete relief. Selective Serotonin Reuptake Inhibitors (SSRIs) are a class of drugs commonly prescribed for depression. They function by increasing serotonin levels in the brain, which can help to alleviate depressive symptoms. However, the effectiveness of SSRIs varies among individuals, and while many patients experience improvement, a significant proportion may only feel a partial reduction in their symptoms or may require additional treatments such as psychotherapy, electroconvulsive therapy, or other medications.