How long does getting an IV take? April 27, 2019 20:39 Follow The length of infusion time varies with type of IV. Some IV’s take only 30 minutes while others take a couple of hours. Related articles Why can’t I just walk in to get an IV? How often will I be able to receive vitamin therapy? If I am not feeling well can I get an IV? Does insurance cover IV vitamin therapy? Comments 0 comments Article is closed for comments.