I have been using Xalatan for several months now. It seems my eyes are more bloodshot than usual. I was using Lumigan before that and my drug provider had me change to Xalatan. My eyes also got bloodshot with Lumigan. Is this common for both drugs? What can I do to clear my eyes? Also, I have always taken an antihistamine at bedtime. I (for the first time) noticed it said not to take if you have glaucoma. Why?