LOVED BY CAT OWNERS EVERYWHERE
As Featured In

"Existing treatments are invasive shots and pills that aren’t much help [...] But one start-up called Pacagen is finally changing all that"

"This spray works proactively to ensure symptoms never manifest”
how it works

Cats produce an allergen called Fel d 1 in their saliva. This is what causes cat allergies.

We engineer proteins called nanobodies that can bind to and neutralize these allergens!

We put these nanobodies into sprays for easy use. Simply spray in the air and on surfaces every 2-3 days.

The result: up to 98% of allergens are neutralized, which means less sniffles and more cuddles!
How to use it
Find areas in your house that cats frequent, such as the couch, the bedroom, or nearby litter box.
Spray these areas generously with our Allergen Neutralizing Spray and wait 10-15 minutes for the nanobodies to work their magic.
Repeat this process every 2-3 days based on symptoms to enjoy your newly discovered allergen-free life!
The Science Behind Pacagen
Our search for a better way to manage cat allergens began with an unexpected key player: alpacas! Inspired by their unique immune systems, we developed nanobodies that have the remarkable ability to exclusively bind to Fel d 1 without affecting cats or people.
Through a binding mechanism only possible because of our nanobodies' unique structure, our products are able to reduce airborne Fel d 1 concentrations by up to 98%, making it the most effective cat allergen reducer available.

A Story Rooted In Love
Pacagen’s journey began with love at first sight. When Dr. Evan Zhao and Dr. Siyang Han welcomed their British Shorthair, Miaomiao, into their lives, their joy was quickly met with a challenge—Siyang’s allergies. Determined not to choose between her health and Miaomiao, Evan, a Ph.D. in Chemical Engineering from Princeton University, turned to his expertise. The discovery of nanobodies that neutralize allergens provided the answer.
The result? A cat allergen spray, safe for pets and people. “Now, we can enjoy Miaomiao without worry—and that’s what I want for every pet family,” Evan shares.

FAQs
Definitely! We made sure to use a completely pet-friendly approach when creating our formulas. Each part of the formula was hand-picked to be safe for everyone, four-legged or not, involved. However, it’s best to avoid spraying directly onto cats – mainly because cats usually don’t like getting wet. On top of that, the allergen-neutralizing nanobodies are always manufactured to food-grade standards.
The nanobodies are proteins, so they are subject to degradation when dissolved in tap water, as minerals and impurities can disturb the nanobodies’ structure. The Stabilizing Solution is formulated to preserve the nanobodies’ structure as long as possible without hampering its neutralizing properties.
We don't currently make a scent-free version. However, the scents included in our Allergen Neutralizing Powder are very mild and are included in very small quantities. Most customers report that the scent is close to unnoticeable after spraying.
Our products use the latest developments in biotechnology to provide you with a safe, pure, and environmentally friendly solution to your allergies. Internal testing found that our nanobodies are capable of neutralizing up to 98% of Fel d 1. Other products on the market are only able to neutralize up to 50% of Fel d 1. On top of that, our products are incredibly safe to use and are non-invasive to you and your pet’s routine.
The nanobodies don't expire, but they are most effective within 1 month of dissolving in distilled water. However, if you dissolve the nanobodies in our Stabilizing Solution, it'll be effective for up to 2 months.
Spraying frequency depends on a lot of factors, including how much Fel d 1 your cat produces, how severe your allergies are, and how sensitized your immune system is. We recommend starting out by spraying once every 2 days, then increasing or decreasing the frequency depending on if your symptoms are still present.
We take pride in the fact that our sprays are designed with environmental consciousness in mind. Where possible, we use biological ingredients that have no long-term environmental impact. In fact, 99% of the ingredients in the powder are biodegradable! We also make sure that all of our partners share a similar commitment to environmental consciousness.
For orders within the contiguous United States, we offer 3-day and 5-day shipping options. To Hawaii & Alaska, orders can take up to 8 days to arrive.
For orders to Canada, please allow up to 10 days for shipping, as CBSA processing times vary.