Antidepressants, made in EUGMP and WHO GMP approved facilities, regulate brain neurotransmitters (e.g., serotonin, norepinephrine) to alleviate depression. Types include SSRIs (e.g., fluoxetine) and SNRIs (e.g., venlafaxine), each with distinct formulas. Vital in mental health and pharmaceutical sectors, they improve mood and energy but may cause side effects like nausea or insomnia, requiring careful management.