Large retailers like and Petsmart carry a variety of lysine formulations. Pros: Same-day pickup; staff can help locate products.
Most vets stock professional-grade lysine supplements in their clinics.
If your cat is dealing with feline herpesvirus (FHV-1) or frequent upper respiratory issues, L-Lysine is a go-to supplement. It is widely available both in-person and online without a prescription. Where to Buy Lysine for Cats 1. Pet Specialty Stores where can i buy lysine for cats
Avoid buying "human" lysine supplements unless directed by a vet, as they may contain additives like xylitol which are toxic to cats. Common Forms of Lysine Treats/Chews: Easiest for "snack-motivated" cats.
Can be rubbed on a paw for the cat to lick off or mixed into meals. Large retailers like and Petsmart carry a variety
Websites like and Amazon offer the widest selection and most competitive pricing. Pros: Customer reviews; bulk options; auto-ship discounts.
A popular choice for cats who enjoy sweeter palatable bases. If your cat is dealing with feline herpesvirus
Simple to mix into wet food; usually flavorless or fish-flavored.