###Human: Does using Noctiva nasal spray reduce the sodium levels in the body? ###Assistant: Hi. Yes, using Noctiva nasal spray (Desmopressin acetate) can cause a decrease in sodium levels in the blood. The risk is small, and it usually happens within the first month. Then your body starts coping with it. Generally, we measure the sodium levels just before starting the drug, a week after starting the medication and a month after taking the drug. If we find the levels in a stable condition, then we repeat them once in six months. In your case, as you have started the medication, I would advise you to get a sodium level now and a couple of weeks later. If they are normal, then you can get it done for every six months. It is just a precaution to monitor these levels, as the actual risk of developing low sodium levels is less than 10 %.