1. Use Aqueous Vitamin D (cholecalciferol drops) as ordered by your doctor

2. Check with your pharmacist about how to take Aqueous Vitamin D (cholecalciferol drops).

3. He was involved in the discovery of the transformation of cholesterol through several steps to vitamin D3 (Cholecalciferol).

4. The present invention relates to pharmaceutical compositions for preventing or treating osteoporosis, which comprise bisphosphonate-based compounds such as risedronic acids or the salts thereof, ibandronic acids or the salts thereof, or the like, and high-dose cholecalciferol, and which are to be administered once a month.