What is the increased in body s vitamin D3 level post 1 injection of Arachitol (600,000 IUs) only and separately post 1 sachet of cholecalciferol (60,000 IUs) only. My current Vit D level is 9.9 ng/ml. I have been advised 1 sachet of cholecalciferol (60,000 IUs) per week for 12 weeks. However, due to the low level I am taking 1 injection of Arachitol per week for 3 weeks (1 taken, 2 to go) + 8 sachets - 1 per week (2 taken, 6 to go). I am also suffering from Erythema Multiforme & have been taking Betnesol forte for past 3 months with gradually declining dose (1mg twice a day in begining to 0.25 mg /week a fortnight ago). It had to be increased again to 0.5mg/day due to reappearance of EM. All other reports are normal except TSH which is borderline 0.54 in a recent test. (7 mths ago, before EM, it was 3.5).