NADIDE (NAD+) is a coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate linkage. NADIDE was marketed under the brand name Enada. Although Enada (NADH) is marketed as a nutritional supplement, Birkmayer Pharmaceuticals has launched two clinical trials to prove scientifically that Enada is effective. Before these studies could get started they had to also prove to the Food and Drug Administration (FDA) that the stable oral form of Enada (NADH) is a safe substance. Since the mid-‘80s more than 3,000 parkinsonian patients have received NADH, either as intravenous infusion or in the form of oral tablets. Enada (NADH) is the world‘s first and only stabilized, absorbable, patented, tablet-form NADH dietary supplement. It is now available to everyone whose lifestyle demands increased energy, vitality and mental clarity. In other words, it is beneficial not only for patients suffering from chronic fatigue syndrome, Alzheimer‘s disease, depression or Parkinson‘s disease, but for any normal, healthy individual whose lifestyle demands more energy. NADIDE (NADH) may be considered as a therapeutic adjunct for cancer patients to protect them against the general toxic effects of substances such as doxorubicin or cisplatin by stimulating the DNA repair system and by promoting normal cellular biosynthetic responses after chemotherapy. NADH seems to exhibit a chemo preventive effect.