Here in Montana we are fortunate have a veterinarian who graduated from vet school in the early 1950s, and who can basically cure a horse of strangles within 24 hours. Strangles is streptococcus equi., and it causes the lymph nodes in the neck to swell, which can cut off the horse's air supply. This vet's IV treatment is tetracycline, dexamethasone, and Vitamin C, delivered in large doses. Ten years ago, my three horses contracted this very contagious equine disease from new horses in the pasture to our north. They quickly became very ill and totally gunked up with thick, green mucus. However, after the medications plus Vitamin C were injected into their veins, they were 95% better the next day. I followed up with a sulfa drug for ten days. This is the only veterinarian I have heard of who uses IV Vitamin C.
Regarding daily Vitamin C use in humans, I recommend very educational Suzanne Humphries', MD, video: "Vitamin C Basics." It's available on YouTube.
Can you please give us the name of the vet? You can either post your reply here, or leave a comment in the contact form at infusionScientific.com. We are developing a way to make their treatment much easier, effective, and accessible, and are looking for partners. Thanks!