What type of drug is used for the restraint of an animal?

A sedative is used for the restraint of an animal because it works by calming the animal and reducing anxiety or agitation. This allows for safer handling during examinations, procedures, or transport, as it helps to prevent stress-related reactions that could pose risks to both the animal and the handlers. Sedatives decrease the level of arousal and provide a state of relaxation, making it easier to perform necessary veterinary tasks without the risk of injury or distress.

The other drug types listed do not primarily serve the purpose of restraint. Corticosteroids are anti-inflammatory medications that are used to treat various medical conditions but do not affect behavior in a way that aids in physical restraint. Anti-parasitics are designed to eliminate parasites from the host animal and do not impact the animal's overall anxiety or agitation levels. Antibiotics are used to treat bacterial infections and have no effect on sedation or restraint, focusing instead on managing health issues rather than behavior.