An injunction is a court order requiring an individual to do or omit doing a specific action. It is an extraordinary remedy that courts utilize in special cases where preservation of the status quo or taking some specific action is required in order to prevent possible injustice. Injunctive relief is a discretionary power of the court in which the court, upon deciding that the plaintiff's rights are being violated, balances the irreparablility of injuries and inadequacy of damages if an injunction were not granted against the damages that granting an injunction would cause.
There is a balancing test that courts typically employ in determining whether to issue an injunction. The defendant's 5th Amendment due process rights are weighed (heavily) against the possibility of the defendant becoming judgment-proof, and the immediacy of the harm allegedly done to the plaintiff (i.e., how badly does the plaintiff need the injunction). When it is possible, the defendant must always be put on notice of the injunction hearing, and the duration of the injunction is typically as temporary as possible. Additionally, in many jurisdictions, plaintiffs demanding an injunction are required to post a bond.
In fifth amendment cases the injunction is against gov't action.
why not just give the link to the above text instead of writing it out again?
Injunction | Wex Legal Dictionary / Encyclopedia | LII / Legal Information Institute
(INJUNCTIONS: AN OVERVIEW)