No. I do not believe that would cause your symptoms, nor exacerbate them in any way. There is no reason to stop using either one of these medicines as far as your dry mouth and eyes are concerned.
Does this make sense to you?
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I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)