How long does it take horse penicillin to work?

Horse penicillin typically begins to take effect within 24 to 48 hours after administration, depending on the severity of the infection and the individual horse's response. Some horses may show improvement sooner, while others might take longer. It's important to follow the veterinarian's instructions and complete the full course of treatment for optimal results. Always consult a veterinarian for specific concerns regarding your horse's health and treatment.