How safe is Systane? I have an MPH in health education. I want evidence-based research that it is safe not only for the eyes but also to swallow every night the part that goes down my throat. I put 1 or 2 drops in each (very dry) eye, per my ophthalmologist's prescription, after I'm in bed; so some of it goes down my throat. Could it affect my brain function or brain cell health or are there any other unwanted side effects?
Would it be better to remain sitting or standing for, say, 15-30 minutes after putting it in my eyes, to prevent swallowing it? Thank you very much.
YYYY@YYYY