The best thing for a brown recluse bite is 1) azium or dexamethasone and 2) a strong antibiotic for the flesh, like cephalexin.

In bad cases, there is a drug called Dapsone (labeled for human leprosy) that is also effective at neutralizing the necrotic action of recluse bites. However, Dapsone also has an adverse effect on male reproductive organs.

Jack