A Practice Note explaining the key issues counsel should consider before applying for a temporary restraining order (TRO) or a preliminary injunction in federal court. The Note addresses the costs of applying for preliminary injunctive relief, whether to seek a TRO in addition to a preliminary injunction, jurisdictional concerns, obstacles facing plaintiffs who wish to bring applications seeking preliminary injunctive relief, and remedies a plaintiff may pursue if a defendant fails to abide by the terms of an injunction issued by the court.