The exact dosing instructions for nitric oxide supplement is not known. However, most supplements contain an average dose of grams of L-arginine and L-citrulline. We suggest you follow a process known as tolerance mapping to understand just how much nitric acid is required for your body. The process is simple. All you have to do is start with a small dose in Week 1. During the first week, make sure you note down the benefits and side effects that you are feeling. Once your body has adjusted to the lowest dose possible, you can then increase the dosing until you start feeling beneficial effects. Gradually, your body starts adjusting to the supplement and you will hit your optimal dose. However, the temporary recommendations for the supplement that you can take 2000mg-6000mg per day for optimum effects. Please note that overdosing is possible as dose variations can happen due to physiological differences. In case you notice diarrhea, vomiting, weakness, and nausea, stop the supplement immediately and consult your personal physician. Please note that liquids are absorbed much faster than solids and dosages for liquids will be lower than that of solid preparations.
Although deaths from methadone are on the rise, methadone-associated deaths are not being caused primarily by methadone intended for methadone treatment programs, according to a panel of experts convened by the Substance Abuse and Mental Health Services Administration , which released a report titled "Methadone-Associated Mortality, Report of a National Assessment". The consensus report concludes that "although the data remains incomplete, National Assessment meeting participants concurred that methadone tablets or diskettes distributed through channels other than opioid treatment programs most likely are the central factors in methadone-associated mortality." 
It shall be noticed, that in men, approximately 5% of testosterone undergoes 5α-reduction to form the more potent androgen, dihydrotestosterone (DHT), also known as androstanolone. From another side approximately % of testosterone is converted into estradiol (the primary female sex hormone) by aromatase an enzyme expressed in the brain, liver, and adipose tissues. Hence, don`t forget to take precautions to avoid respective side effects. Thereof we recommend to perform blood works and take aromatase inhibitors on cycle (if required, anastrozole preferably) and SERMs (clomifene, toremifene) during post cycle therapy (PCT).