I fill the nebulizer cup with Colloidal Silver , then add a squirt of lobelia & mullein. Are you sure you want to use a nebulizer? That is primarily to get CS deep into your lungs. You may want to use a nasal spray bottle instead? Amazon.Com sells empty nasal spray bottles.
I am only adding 3 drops of DMSO as I am experimenting with the DMSO. Has anyone else tried DMSO in their nebulizer?
Do it for months on end. IMO, there are no limits since you are dealing with such small amounts of Colloidal Silver .
Our best references has said that 2 tablespoons a day can be taken indefinitely without problems. Some of our members have even taken several ounces a day for years without problems.