question: My mother has taken nexium for years. She has recently started taking celexa for her anxiety and depression.She takes 40 mg. of nexium and has started to take 40 mg. of celexa.Her PCP just called and said that she must switch to protonix in place of nexium because of the interaction between celexa and nexium.Do you think there is a problem in taking these two drugs? Would protonix be a better choice?