I was experiencing dark yellow urination especially in the mornings, frequent and clear urine till the rest of the day for the last 9/10 months. Also, nausea and burping disordered defecation and sometimes stomach ache knocking through my chin. Also i was having inconsiderable but continious weakness/fatigue. One week ago, when i had a stomach ache, i found a drug named "Lansor 15 mg." (Lansoprazol) in the medicine chest. After trying it, all of my above complaints disappaered suddenly. Coincidentally, it seems that i had found the cure for my disease which was possibly about my stomach. What i want to ask you is; could this story regarding "concentrated urine - frequent urination" have been harmful for my kidneys? By the way 3/4 months ago i had blood test regarding blood lipid levels, at that time BUN, kreatinin, ure etc... all came just normal. Thank you in advance.