Ohio Rev. Code § 2727.02: Causes for an injunction.

A temporary order may be granted restraining an act when it appears by the petition that the plaintiff is entitled to the relief demanded, and such relief, or any part of it, consists in restraining the commission or continuance of such act, the commission or continuance of which, during the litigation, would produce great or irreparable injury to the plaintiff, or when, during the litigation, it appears that the defendant is doing, threatens or is about to do, or is procuring or permitting to be done, such act in violation of the plaintiff's rights respecting the subject of the action, and tending to render the judgment ineffectual.