Yes, we have tried it once on our first-born. It's a prescription drug, so moms have to use it with caution. Here are some information about Nasatapp: http://www.thefilipinodoctor.com/search-drug-details.php?keyword=Neozep%20Syrup%20(Oral%20Drops)&id=20031141&secid=20030680&sec1id=20020021&sec2id=20020095&sec3id=20020102&sec4id=
We haven't but I think it's just the same as Salinase. Correct me if I'm right. Saline drops are really effective for me and my kids, especially if it's just for runny nose.
Our pediatrician recommended Nasatapp also when our baby had colds. In 3 days, our baby was cured so I would say it is effective.