Monoamine oxidase (MAO) inhibitors work by blocking the enzyme monoamine oxidase, which breaks down neurotransmitters like serotonin, dopamine, and norepinephrine in the brain. By inhibiting this enzyme, MAO inhibitors increase the levels of these neurotransmitters, helping to improve mood and alleviate symptoms of depression and anxiety. MAO inhibitors are primarily used to treat depression, particularly when other antidepressants are ineffective. However, they require dietary restrictions to avoid interactions with certain foods and medications, as they can lead to severe side effects like high blood pressure