can cause dry eye
and research says rarely Losartan
can cause dry eyes
as well. But the fact that the oil glands are less active in aging, dry eye is common.
I would advise to discontinue Meclizine if he can afford to but Losartan discontinuation is not advisable.
Please use tear substitutes like Refresh liquigel 4-5 times a day and Osmega(Omega fatty acids) 1 tab a day for the dry eye situation.