Answers to common questions.

Who is Quello?

In a world of health startups run by techies instead of doctors, Quello is different. Our team of medical allergy specialists have treated thousands of patients over 25 years at our Denver-based clinic. Now we’re bringing evidence-based treatments wherever people need them, along with expert support to overcome allergies for good.

What are allergy drops and how do they work?

Allergy drops are a type of sublingual immunotherapy. This treatment helps your immune system learn to tolerate allergens over time, through specifically dosed exposure to those allergens. You place customized drops under your tongue daily and over time your body builds a lasting tolerance. This process can reduce or eliminate your allergy symptoms for years. Unlike medications that mask symptoms, allergy drops address the root cause of allergies to help you overcome allergies for good!

Is Quello for me?

We're working hard to bring Allergy Freedom nationwide!

Currently, Quello is available in Arizona, Colorado, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Louisiana, Michigan, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, Wisconsin, and Wyoming.

Don't see your state yet? We're expanding soon. Check out our About Page to get notified when we're available in your area.

Please note, we can only work with patients ages 4 and up. We don't bill insurance, so your price never depends on your insurance coverage. Treatment is HSA and FSA eligible.

What allergens does Quello test for?

Our comprehensive allergy test screens for the 40 most common indoor and outdoor environmental allergens that affect millions of people daily. We’ve carefully selected these based on clinical research and prevalence data to give you the most actionable insights about your allergic triggers.

These specific allergens include:

Pet allergens:

Cat Dander
Dog Dander
Horse Dander

Grass and shrub pollens:

Bahia grass, Bermuda grass, birch, common ragweed, Johnson grass, mugwort, mulberry, nettle, perennial ryegrass, rough pigweed, Russian thistle, sheep sorrel, Timothy grass, and more

Tree pollens:

Acacia, alder, Australian pine & beefwood, birch, cottonwood & poplar, elm, maple & box elder, maple leaf & sycamore, mountain cedar, oak, olive, pecan & hickory, rough marsh elder, walnut, white ash, and more

Indoor allergens and other triggers:

Common molds (Alternaria alt., Aspergillus fum., Aureobasidium, Cladosporium fum., Penicillium notatum)
Dust mites (B. tropicalis, D. farinae, D. pteronyssinus)
Cockroach allergen
Mouse allergen

Why do you focus on these 40 allergens?

We selected these allergens because they represent the most frequent causes of environmental allergies and provide cross-protection against many related allergens. When you treat allergies to these common triggers, you often get relief from rarer allergens with similar protein profiles through cross-reactivity. For example, treating birch pollen allergies can also help with reactions to alder and hazel pollens, while addressing dust mite allergies often reduces sensitivity to other storage mites. This targeted approach provides comprehensive relief, while keeping testing efficient and effective. Rather than testing for hundreds of rare allergens that may never affect you, we focus on the ones scientifically proven to be most likely impacting your daily life.

Can I use my existing allergy test results?

Yes! We love helping people who are starting to understand and treat their allergies. You can schedule a free consultation with one of our providers to talk about next steps. All we need are test results taken within the past 2 years. We’ll review your results and begin your journey to Allergy Freedom.

Are Quello Drops safe and effective?

Absolutely! Doctors have used allergy drops worldwide for over 60 years to treat allergy symptoms. They're safe for children and people with chronic conditions. Allergy drops use the same FDA-approved antigens trusted by allergists everywhere.

National Jewish Health and the World Health Organization have done many studies on sublingual immunotherapy. These leading institutions confirm its safety and effectiveness.

Are there side effects?

Side effects are rare. However, some patients might notice more allergy symptoms. You might feel an itchy mouth or throat, some irritation around the mouth, or an upset stomach. This usually occurs for an hour or two in the first week after starting drops or starting a new bottle. If these symptoms occur, most patients get immediate relief by taking Benadryl, Zyrtec, or Allegra. If the symptoms continue, contact us. On occasion, your drops may need to be diluted.

How many drops do I need to take?

Follow the instructions in your allergy drops kit. Typically, you’ll take three drops per day.

How long are people on allergy drops?

Allergy drop treatment generally lasts four years depending on the severity of your allergies. After that time, some patients find their symptoms are in remission for 10 to 25 years.

How do allergy drops taste?

Slightly sweet, which comes from the preservative agent in the drops.

How much does Quello cost?

Getting started costs $12.99 to ship your test kit. Your at-home test, the lab work, and your initial consultation with a licensed provider are all free.

Treatment, if you and your provider decide it’s a fit, is $297 per quarter or $999 a year. That one price covers your personalized drops, unlimited follow-up visits, and shipping on every bottle. There are no visit fees and no charges that show up later.

We don’t bill insurance, so your price never depends on a deductible or how many visits you attend. The number here is the number. Treatment is HSA and FSA eligible.

What happens after I request my test kit?

We mail you the kit, and it takes about 2 minutes to complete. You collect a small blood sample, seal it, and send it back in the prepaid envelope. From there the lab checks your sample for antibodies to 40+ common environmental allergens, and results come back in roughly a week. That tells us what you're sensitized to, which is a starting point rather than a diagnosis. That's why the next step is a conversation. Your consultation is free, and it's where our specialty trained providers read your results against your actual symptoms, your history and your other health conditions. A lab result on its own doesn't tell anyone what to do. This is also where we find out whether allergy drops are a fit for you, because not everyone is a candidate, and we would rather tell you that here than later. If drops are right for you, your provider prescribes them and we formulate them for what showed up in your test and history.

What should I do if I break or lose my drops?

What do I do if I miss a day of allergy drops?

To get the most out of your treatment, consistency is key. But if you miss a day or more of drops, do NOT play catch up by taking more than three drops a day. If 2-14 days are missed, resume your drops as prescribed. If more than 14 days are missed, contact us before restarting.

What if there is serum left in my bottle when I receive my new bottle?

The allergy drops are mixed with extra serum to ensure that no one runs out before their next bottle is due to arrive. When the bottle arrives, it is very important to throw out the old one (even if there is still serum in it) and begin the new bottle.

Have more questions? Ask us anything.

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The science of overcoming allergies

By putting this proven treatment in people's hands at home,

Quello removes the barriers to an allergy-free life.

Drops vs. Shots

Quello Allergy Drops

Allergy Shots

Answers to common questions.

Home

Test Kit

Pricing

About

Learn

Blogs

FAQs

Contact Us

My Account

The science of overcoming allergies

By putting this proven treatment in people's hands at home,

Quello removes the barriers to an allergy-free life.

Drops vs. Shots

Quello Allergy Drops

Allergy Shots

Answers to common questions.

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