Marplan is a brand name for the medication isocarboxazid, which belongs to a class of drugs known as monoamine oxidase inhibitors (MAOIs). MAOIs are used to treat depression, anxiety, and other mental health conditions. There are a few other brand names for isocarboxazid, including Enerzer, Ionex, and Novamid. However, it is important to note that isocarboxazid is a prescription medication, and only a trained healthcare provider can determine if it is the appropriate treatment for an individual's specific health condition. Always consult with a healthcare provider before starting or changing any medications.