Moclobemide is a monoamine oxidase (MAO) inhibitor used to treat certain types of mental depression. It works by blocking the action of a chemical substance known as monoamine oxidase (MAO) in the nervous system. Although this medicine is very effective for certain patients, it may also cause some unwanted reactions if taken the wrong way. It is very important to avoid certain beverages and medicines while you are using moclobemide. Your doctor may provide a list as a reminder of which products you should avoid. This medicine is available only with your doctor's prescription.