Fergus Fungal Budge was a fungicidal product that treated ringworm infections on the feet. It was available in three sizes, suggesting that it was not a potion, but some sort of medicated dressing. The product contained extracts of onion juice, jewelweed, and neem oil. It was not recommended for use by elves. An advertisement for this product appeared in the Daily Prophet in 1996. Ronald Weasley owned this product.
- Harry Potter and the Order of the Phoenix (film) (Mentioned in a newspaper)
- Harry Potter and the Order of the Phoenix (video game) (Mentioned in a newspaper)