I am taking pexep cr 12. 50 mg one and half tablet and sulpitac 50 per day. I am taking these medicine from two years. When pexep is decreased to one tablet i.e 12. 50 mg I do not feel relaxed and do not get quality sleep but I can concentrate and learn new things. When taking 12.50 and half I have problem that I have difficulty in concentration and I cannot learn new things. My mind is relaxed and I am doing good but I am not satisfied with the dose because I cannot concentrate and learn new things.