There are also some medications that can cause dry mouth, eyes, etc., like some antidepressants or migraine meds. My eye dr put me on flaxseed oil, 1000 mg twice a day to help get more moisture. I can really tell a difference. It's also a healthy omega-3 fatty acid! He also told me to use Theratears drops. Erin, I'm with you on the Pataday! I had a sample and loved it, but when it ran out it was so expensive DH wouldn't fill it for me.