Also found in: Dictionary, Legal, Acronyms, Encyclopedia, Wikipedia.
IUThe JCAHO directs that this abbreviation be avoided in handwritten records because it can easily be misread as IV.
IUInternational Units, see there.
International unit (IU)
Patient discussion about IU
Q. my Dr. said to take no more than 400 iu of Vit. E. But I noticed my multiple also has 200 IU. Is this bad? I have been taking 400 units to combat Peyronies. I noticed today that my Centrum Silver also contains Vitamin E. I know taking over 400 units can be toxic, so now which way do I go from here. Thanks for any info.