Allergic reactions to Substances. People who are allergic to any of the next shouldn't get clonidine. For people who get dizzy when standing: This issue is called orthostatic hypotension. Clonidine will make this issue even worse. Don’t get up way too speedily and make sure not to get dehydrated. https://cheapbookmarking.com/story19644336/onolidine-fundamentals-explained