From the very moment of birth, foals, yearlings and older horses will inevitably and almost constantly acquire a considerable amount of cuts, abrasions, bruises, and unfortunately sometimes very severe injuries. It is important to always be prepared with as many different types of medications that will address cuts and wounds using conventional, homeopathic and perhaps even herbal methods. Wounds that are topically not too serious or severe will just need the usual topical applications. If we delve into situations with deeper wounds but are not severe enough to call a veterinarian, then you may want to use basic homeopathic elements to help the healing process. People that are new in the horse industry may have to rely on a veterinarians advice and guidance until they learn the difference between a horse that can heal from a wound with the help of proper care internally and externally, and a wound that needs more than just a diligent horseman, but needs the immediate care of a professional veterinarian. Being properly prepared for the inevitable careless antics of your horse or horses is half the battle. You will also need to have bandaging material of different types, such as gauzes and cottons. Gauzes and cottons will go directly on the leg next to and over the wound and need to be kept as sterile as possible. Then there are bandages that go over these gauzes and cottons, and outer bandages to hold the whole thing together and hold everything in place.
My first suggestion would be for you to acquire a heavy plastic, fairly large storage bin, that has a tight fitting lid. You need something that has easy access. Find a reputable tack shop that carries over the counter medications. Explain that you are starting your basic first aid kit. As I have said before, horseman are always happy to help other horseman. Let them know what your budget is, how many horses and so on. You should have something for washing wounds, usually iodine based, a medication that is geared towards drying out the wound and a back up that is anti-bacterial and/or anti-biotical. Always keep an eye wash of some type, even if it is only saline solution. There are mouth swab type medications for horses that get sores in their mouths usually from the bit. There are salves for drawing objects such as splinters out of their hide or from their foot. Try to stay basic and build from there as you learn more about your horses mistakes. Take a pen and paper with you and write down the things you see in the tack shop that you may be able to get on your own such as alcohol, mineral oil, talcum powder and such. The gauze and cotton may be well priced at the tack shop as well as the leg bandages you will need.
If you choose to use homeopathic or herbal remedies to enhance the healing process for more serious injuries, going into a major health food store or large chain that specializes in vitamins, they will be able to help you choose just the basics that you will need. As I have mentioned before, there are specific books out now that were written to teach horseman about the uses of homeopathic and herbal remedies. These books will also teach you about dosage. My personal experience with using homeopathic and herbal remedies has been phenomenal. I always have these available not only for the horses but I use these products myself.
Lastly, you will need to ask your veterinarian about eye ointments and the basic non-prescription medications necessary for inflammation or severe bruising or medicines for situations that a tranquilizer is necessary. Horses are sometimes in areas that a veterinarian cannot reach in a reasonable amount of time. Keeping this in mind, you may want to address the issue of the possibly of colic and what medicine you will need to have available for minor colic issues or until the vet can arrive. As you will learn, horses are actually in many ways, very delicate. Sometimes having the correct medications or the right bandages to address a severe situation can make a major difference in the life of your horse and in your life as well.