Well, I broke down and took a decongestant today. Yesterday I had a couple of dizzy spells. I think they were caused by congestion in my head, which in turn is caused by my allergies. My allergies have been really bad these last couple weeks. The battle's just too big for regular Claritin. So I sent in the big guns: Claritin-D. Now instead of dizzy spells, I'm dizzy constantly. And I have to remember to drink LOTS of water.