The vets that serve any number of communities are often the most intensively engaged of medical experts. They will know things like equine pain relief antiInflammatory which is something that should be relevant to places like stud farms. Usually vets here are heroes, or doing a heroic effort for all sorts of animal species.
Domestication does not mean that the animals found within paddocks are too far from the wild. When in pain, they usually revert to their natural physical instincts, which could include kicking and biting. This even when trainers or handlers are persons they already know well and are affectionate with when they are healthy.
Drugs are administered to horses which are experiencing pain. Inflammations of the muscles, perhaps the organs and any part of the body are a common enough condition for the equine species. But this will often be something that should be treated with care, and those who are not experts should not do it even if they can.
Vets or course are so busy, especially in those communities with lots of farm animals. Horse are usually found in these and nowhere else, not especially in cities where they have no room for exercise. The exercise, the need to move around, is a thing that often leads to inflammation and related symptoms.
Anti inflammatories are among the most sensitive of drugs to deliver. Also, any veterinarian is trained to inject or use the precise amount that is needed by a horse. Anything lower or higher might actually help to worsen the symptoms that the equine being treated has.
Your vet is often the most experienced in your area, and this may work with a number of other experts in clinics. But usually a veterinarian works on his own, but with a staff of related experts. The clinic may be complete with machinery, tools and stocks of drugs for any purpose or emergency.
The fact is that preparing for the work with horses is a thing that the vet does should really be experienced in. Some of the more important concerns here is that a horse needs to be sedated before the drugs for inflamed muscles say should be administered. This means the doc should do this too, and not just anyone.
Most handlers or farm hands may be allowed to use things like sedative guns on their charges when necessary. This might apply to a horse in pain, which can really be risky to approach and treat. When experienced, the hands here may do the job even before the busy vet gets to the location, which is something that the medical expert should be well informed about.
Inflammation in any part of the horse may be so treated, but it might vary with special needs or conditions. There are several things which make the process more effective, one of which is a good system in place for a breeding farm. It is a thing that is already a well established practice for the busiest and well run places that breed or use equines.