Antidepressants are medications used to treat depression, anxiety, and other mood disorders. They work by balancing chemicals in the brain, such as serotonin and dopamine, to improve mood, reduce stress, and enhance overall well-being. There are different types, including SSRIs, SNRIs, MAOIs, and tricyclic antidepressants, each with unique effects and potential side effects. While they can be highly effective, they may take a few weeks to show full results. Always consult a healthcare professional before starting or stopping antidepressant medication.