What Causes Dizziness While On Oxybutynin?

I take oxybutrynin, which makes me dry and can make one dizzy. I take other meds that can cause dizziness. I take metoprolol BID and Lamital QD for blood pressure. I take NSAID Meloxicam for extensive O-arthritis. I went off 30 mg duloxetine after July 26--accidentally cold turkey because I was out of town over a week without it. I have stayed off it because it can also cause dizziness & stomach bleeding, etc. However, the sudden withdrawal has made me quite dizzy, that combined with the high altitude when I was in the mts. (I live in Denver), so a nurse last night suggested Meclizine till I get less dizzy & have less mental fog, but I m not sure it won t be a problem too. Tomorrow I have to drive my husband home from day surgery way across town.