Benzalkonium vs Benzethonium

After 5 months of using Lastacaft, my eyes became swollen, baggy and droopy. After several weeks of this, I stopped using it (after consulting with my eye doctor, who said I was having an allergic reaction) and my eyes returned to normal after about a week. It worked for my allergies, but I was allergic to some ingredient in it.

I had 4 piercings in both ears at one time. Was give a 16 oz bottle of Icing Ear Care Solution, the main ingredient being Aqua then Benzalkonium Chloride. My ears have never been this sore after being pierced. I couldn't lay on my ear, having to "cup" the ear area with my hand. I returned to the old, but tried and true Hydrogen Peroxide and immediately felt relief. I again tried using the Benzalkonium Chloride to keep my new piercings clean - but they just became inflamed, red and sore. I'll continue to use Hydrogen Peroxide to clean my piercings. However, I've read some other uses for Benzalkonium Chloride that may be useful. I hope so. I'd hate to waste 16 oz of a medication for nothing.