As I have mentioned in another post, I am currently in France for 3 months and recently had a blood test as I felt so rubbish. Turns out my Vitamin D is 14 (30 - 100) so well below what it should be. The Doctor I saw here said to take supplements and go to see my doctor on my return to the UK in September. I have just been to the chemist and she said that I should have been given a prescription. I explained that I am just visiting and will see my own doctor in a few weeks and she gave me an over the counter dose of ... 100,000 UI. It is a one off dose in an Ampoule and is taken orally. One thing it does say is not to take it if you are allergic to Vit D but how would I know?? Has anyone else had a dose this size??