Marplan is portrayed to be a natural solution and an alternative to the conventional antidepressants. Unlike the normal prescription drugs that keeps the levels of all the chemicals in the brain at an equal level without necessarily raising them, this supplement actually raises the levels of all the chemicals in the brain and thus it is not the first option offered by doctors to those who suffer from anxiety and abnormal depression. Marplan consists of Isocarboxazid (also known as Marplan), lactose, corn starch, povidone, D&C Yellow No.3, and magnesium steareate.