Is it ok to take a multivitamin without a doctor tell you to?

Yes: It is ok as long as you take it as directed on the bottle. Better if you try to get your vitamins through a healthy diet. Take care!

Yes/No ?: Multivitamins are marketed directly to patients because they are considered non-toxic and exempt from other government review. So you do not need a doctor. However, multivitamins are pretty useless and almost never needed in an adult. Unless you have a specific vitamin deficiency or a very restricted diet, you do not need them. Multivitamins can be toxic and cause multiple medical problems.