Allergic reactions to Substances. People who are allergic to any of the next should not take clonidine. For people who get dizzy when standing: This issue is called orthostatic hypotension. Clonidine will make this situation worse. Don’t stand up as well swiftly and make sure not to have dehydrated. https://thebookmarkplaza.com/story19716403/5-tips-about-onolidine-you-can-use-today