Procaine hydrochloride is widely used as a local anesthetic in medical and dental procedures. It works by blocking nerve signals in the body, providing temporary pain relief during minor surgeries, injections, or dental work. Its fast-acting nature makes it suitable for short-duration procedures. Additionally, it is sometimes used in diagnostic tests, such as spinal anesthesia, to assess nerve function. In veterinary medicine, it is applied to numb tissues during surgeries or treatments for animals. Due to its vasodilatory properties, it has also been explored in certain therapeutic contexts, such as improving blood flow in specific conditions. However, its use has declined with the advent of more advanced anesthetics.