can saline drops should be used only 3 times a day ? or else can be used whenever the nose is blocked ?

A. You can use it four or five times in the day if a gap of every 4 to 5 hours each because this is safe to be used this way and nasal drops once you use is going to open the nasal passage for at least 4 to 5 hours after that you can use it again if it is needed