<s>[INST] My husband has severe knee,foot, and muscle pains. His doctor recommended for blood test to find the vitamin D3 levels. The reports showed levels as 5.5. His doctor suggested to take SHELCAL 500 -1 Tab / day. Now he started taking this SHELCAL 500 from last 2 weeks. But the muscle pain has not yet gone.Can you please kindly suggest how many days after taking this tablet, we can expect the pain relief. [/INST] Hello, In my opinion you are doing a good job by following the doctors instructions, however there is no specific number of days that he can feel better as it depends on many factors, but you can do things better by giving him more vitamin D from sun exposure for 20 to 30 minutes daily. Also increase food intake of vitamin D, Dried figs with a spoon of olive oil is a great option.walking also can help within tolerance of pain. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Ayman Darrag </s>