dietary supplementation
"Sugested by ophthalmic surge after lasik surgery caused lack of tears.  After few days had flu like symptoms; achy, chilled, gas, diarrhea.  I thought I had the flu, so started again two days later - same symptoms lasting all day.  Still  didn't relate pills to symptoms - up all night and spacey the next day. Stopped taking the dang things and feel fine now, but still have dry eyes."