a. Any medication that is diuretic in nature can cause dry eyes
Alcohol ! (often used as a drug!)
Diuretics e.g. some hypertension medication
Angiotension converting enzyme inhibitors (hypertensive medication)
b. Anti histamines and decongestants
c. Sleeping pills
d. Birth control pills
e. Certain anti depressants
f. Opiate based analgesics e.g. morphine