2695 East Foothill Blvd

Pasadena, CA 91107 US



Zeuterin is a revolutionary non-invasive, non-surgical method for neutering 

Zeuterin™ Common Questions

What is Zeuterin™ and is it right for my dog?
Zeuterin™ is a non-invasive and non-surgical neutering technique that uses medicine Zinc Gluconate neutralized with L-Arginine injected directly into a dog’s testicles to prevent sperm production, thus sterilizing the dog and preventing them from reproducing. It is the first form of non-invasive and non-surgical neutering approved by the U. S. Food and Drug administration (FDA) for use in dogs. 

What is Zeuterin™ medication?
Zinc gluconate neutralized with L-Arginine is the first compound ever to be approved by the FDA as safe for sterilization. It uses Zinc Gluconate (a trace element) and Arginine (an amino acid), both of which are essential for the body. In fact they are health supplements that millions of use every day. 

How does Zeuterin™ sterilize a male dog?
A specific concentration of Zinc Gluconate neutralized with Arginine creates permanent sterilization with no adverse reaction needing medical treatment nearly 99% of the time. The mechanism is so targeted and precise that in an FDA study, it virtually stopped spermatogenesis in 99.6% of young dogs 3 to 10 months old, rendering them sterile, while maintaining the endocrine function of the testes.

When does the dog become sterile?
The sterilization procedure effectively shuts down sperm production within 1 to 3 days. However, Sperm in the vas deferens and possibly the epidiymis can reside for up to 30 days. Hence, a sexually mature Zeuterin™ neutered dog could potentially impregnate a female up to 30 days past injection. 

What happens physically to the testicles?
During the procedure, a single injection of Zeuterin™ is administered directly into each testicle. Following the procedure, over time, the testicles generally shrink and change texture due to fibrosis (scar tissue formation).


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Read What Our Clients Say

  • "Have been taking my cats to RCVH for years. The Vets and office staff have always been great. My current Vet Dr. Brickman is exceptional: she took over from my previous Vet who moved away. She is very patient and listens to my concerns regarding my elderly male cat. She is a real professional."
    Lori H. Pasadena, CA

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