Allergy Shots For Humans Allergic To Cats: Does SCIT Work?
Yes — allergy shots specifically for humans allergic to cats exist; they are subcutaneous immunotherapy (SCIT) using FDA-standardized cat-hair or cat-pelt extract (10,000 BAU/mL, Greer license #308). Cytopoint, Apoquel, and veterinary allergen-specific immunotherapy are unrelated dog/vet products; this page covers SCIT for HUMANS allergic to cat dander. Alvarez-Cuesta 1994 (JACI, 28-patient DBPC) and Varney 1997 (Clin Exp Allergy, ~72% symptom reduction) are the foundational cat SCIT trials. Cat SLIT drops (Alvarez-Cuesta 2007 Allergy DBPC) showed 59% symptom-score reduction vs placebo — the at-home alternative with RCT evidence. Fel d 1 is detected in 99.9% of US homes including cat-free homes (Salo NHANES 2014); rehoming alone is not a reliable solution on any useful timescale.
12 peer-reviewed sources
Yes, allergy shots for humans allergic to cats are subcutaneous immunotherapy (SCIT) with FDA-standardized cat-hair extract (10,000 BAU/mL) — not a veterinary product. The Alvarez-Cuesta 1994 DBPC and Varney 1997 trials confirm efficacy with ~72% symptom reduction.
The essentials
Yes, there are allergy shots specifically for HUMANS who are allergic to cats — they're called subcutaneous immunotherapy (SCIT) and they use FDA-standardized cat-hair extract (10,000 BAU/mL). They are NOT veterinary products. Cytopoint, Apoquel, and veterinary allergen-specific immunotherapy are different categories (and Cytopoint/Apoquel are actually for dogs, not cats — they show up in your search results because of overlapping queries). For cats with skin allergies, see a veterinarian. This page covers subcutaneous immunotherapy for humans who are sensitized to cat dander.
Cat allergy SCIT uses FDA-standardized cat-hair and cat-pelt extracts — the only FDA-standardized mammalian allergen extracts in the United States (Greer Laboratories license #308, FDA CBER allergenic extract list). Both are standardized at 10,000 BAU/mL, meaning the dose administered in Boston is the same as the dose administered in Phoenix. This standardization advantage does not exist for dog, horse, guinea pig, or any other mammalian allergen.
The core allergen is Fel d 1 — a 35–38 kDa tetrameric secretoglobin produced in the sebaceous, salivary, anal, and lacrimal glands of cats — which sensitizes 90–96% of cat-allergic patients (Satyaraj E et al., Allergy 2019; Grönlund H et al., Int Arch Allergy Immunol 2010; Bonnet B et al., Allergy Asthma Clin Immunol 2018).
Curex offers at-home IgE component testing with board-certified allergist review for Fel d 1 (cat-specific secretoglobin), Fel d 2 (serum albumin), Fel d 4 (lipocalin), and Fel d 7 (lipocalin) — distinguishing genuine cat sensitization from cross-reactive sensitization originating in horse or dog exposure via the lipocalin family.
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See if at-home shots are right for youFrequently asked questions
Are there allergy shots specifically for humans allergic to cats?
Yes — SCIT using FDA-standardized cat-hair or cat-pelt extract (both at 10,000 BAU/mL, Greer license #308) is specifically designed for HUMANS sensitized to cat dander. It is administered by an allergist following the build-up and maintenance schedule defined in the AAAAI/ACAAI/JCAAI Practice Parameter (Cox L et al., JACI 2011). This is distinct from any veterinary product. Cat is the only mammalian allergen with FDA-standardized extracts in the US, which gives it a dosing-consistency advantage over dog, horse, or guinea pig immunotherapy.
What makes cat allergy shots different from Cytopoint or Apoquel?
They are completely unrelated products for completely different purposes. Cat allergy shots (SCIT) are given to HUMANS to reduce their allergic reaction to cat dander by reprogramming the immune system over 3–5 years. Cytopoint (lokivetmab) is an anti-IL-31 monoclonal antibody injected into DOGS every 4–8 weeks to reduce itch from canine atopic dermatitis. Apoquel (oclacitinib) is an oral JAK inhibitor given to DOGS ≥12 months for allergic itch. Both Cytopoint and Apoquel are canine veterinary pharmaceuticals — they are not approved for humans, not approved for cats, and do not address human IgE sensitization to Fel d 1.
Does rehoming a cat eliminate the need for allergy shots?
Not reliably. Salo PM et al. (JACI 2014;134:350–359; PMC5516632) found Fel d 1 in 99.9% of US homes including cat-free homes, because the protein is deposited on clothing, furniture, and carpets and persists for months to years after the cat leaves. Additionally, Hilger C et al. (2024, PMC10975736) confirmed that Sphynx cats (hairless) still produce Fel d 1 in sebaceous glands. Full remediation after cat removal requires aggressive cleaning and replacement of soft furnishings and typically takes 6–12 months before significant Fel d 1 reduction is achieved.
How long does cat allergy SCIT take?
The standard regimen per Cox L et al. (JACI 2011) is a ~26-week weekly build-up phase reaching maintenance dose (approximately 1,000–4,000 BAU with FDA-standardized extract), followed by maintenance injections every 2–4 weeks for 3–5 years. Year 1 requires approximately 39 in-clinic visits. Total course visits: approximately 95–119 over 3–5 years. Durham SR et al. (NEJM 1999) showed that 3 years of SCIT produces sustained remission lasting at least 4 additional years after stopping — the tolerance is durable, not just suppressive.
Is there an at-home cat allergy shot?
Yes — there are now two at-home routes. The cat allergy shot itself (SCIT) can be self-administered at home through Curex: the same FDA-standardized cat immunotherapy, given as a weekly subcutaneous shot, made safe for eligible maintenance patients by a specific safeguard stack — a serum sterile-compounded to USP <797>, a prescribed epinephrine auto-injector confirmed on hand before the first injection, the first dose and every dose change supervised live over Zoom by the prescribing allergist, gradual dose escalation, and ongoing board-certified-allergist oversight. Separately, sublingual immunotherapy (SLIT) drops can also be self-administered at home: Alvarez-Cuesta E et al. (Allergy 2007;62:810–817) conducted the first DBPC RCT of cat SLIT drops, finding 59% reduction in symptom scores vs placebo with no systemic reactions. Both use the same immunologic mechanism — allergen-specific IgE → IgG4 class switching and T-regulatory tolerance induction — and both remove the ~39 Year-1 in-clinic visit burden of conventional SCIT.
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This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. Content reviewed by board-certified allergists at Curex.