Fiona123I take Buspar tablets 5mg three times a day for the anxiety that is associated with the IBS-D. My therapist told me you have to take them on a regular basis for them to have any effect, you can not take them as and when needed, they wont work, and they are only supposed to be used for a maximum of 3 months as the body can get used to them and you start to show more signs of anxiety.