Can allergies or irrital bowel syndrome cuase high blood pressure?

Q: Can allergies or IBS, or the treatment of either, cause high blood pressure? My BP is higher in the morning and I tend to be a worrying type of person as well.

A: Anxiety and stress is associated with irritable bowel syndrome and high blood pressure. Regular exercise has been shown to relieve stress and help both of these conditions. Medications that are used to treat irritable bowel syndrome and allergies can elevate blood pressure. It is well known that combination decongestant/allergy medications commonly found on store shelves can elevate blood pressure.