N
- Neomycin –
- Nitarsone – feed additive used in poultry to increase weight gain, improve feed efficiency, and prevent blackhead disease
- Nitenpyram – insecticide
- Nitroscanate – Anthelmintic used to treat Toxocara canis, Toxascaris leonina, Ancylostoma caninum, Uncinaria stenocephalia, Taenia, and Dipylidium caninum (roundworms, hookworms and tapeworms).
- Nystatin – Antifungal
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