My insurance won’t cover it unless it’s through a nebulizer or other device. One doc got it through for me one time somehow but it wasn’t eligible for refill. I am on Medicare and have a good quality supplement plus a drug plan. Some nebulized meds go through Medicare part B, but must have a medication in them in addition to the saline for Medicare part B to apply. A rinse bottle isn’t considered a device. I think there are a few nonsensical rules where Medicare is concerned but I can’t really complain. They are very good when it comes to covering nebulized medications that sometimes can be very expensive.