Bermuda Grass Allergy Shots: The Only FDA-Standardized Warm-Season SCIT
Bermuda grass allergy shots (SCIT) use the only FDA-standardized warm-season grass extract — and the only one proven in a randomized controlled trial to cut nasal symptom scores by 51% versus placebo (Tabar et al., 2005). Because Bermuda lacks Group 5 allergens entirely, a Timothy-only SCIT regimen provides less than 40% cross-coverage for primary Cyn d 1 sensitization, making separate Bermuda vial inclusion essential for Sun Belt patients.
Bermuda Grass Allergy Immunotherapy: How It Works
Allergy immunotherapy is the only long-term treatment that re-trains the immune system to stop overreacting to bermuda grass — rather than just masking symptoms with antihistamines or steroids. By gradually exposing the body to controlled doses of bermuda grass allergen, immunotherapy shifts the underlying allergic response and produces relief that often outlasts treatment by 7–10 years.
There are two evidence-based forms of bermuda grass immunotherapy used today, both built on the same desensitization principle but delivered very differently.
of sustained relief after a complete immunotherapy course — the only allergy treatment with proven long-term effect after stopping.
Allergy Shots (SCIT)
Weekly injections of bermuda grass extract in a clinic, escalating over 3–6 months until a maintenance dose is reached. Continued monthly for 3–5 years. Longest clinical track record for bermuda grass allergy.
- Strongest evidence base for severe and polysensitized patients
- Covered by most insurance plans
- Requires 50–100+ in-person clinic visits across the full course
Allergy Drops / Tablets (SLIT)
Daily drops or dissolvable tablets containing bermuda grass extract, held under the tongue at home. Same desensitization principle, delivered without injections. WHO-recognized as an effective form of allergy immunotherapy since 2001.
- Taken at home — no weekly clinic trips, no needles
- Lower systemic reaction rate than allergy shots
- Curex offers prescription bermuda grass immunotherapy drops with allergist oversight
The rest of this page goes deep on allergen-specific immunotherapy with shots — protocol, efficacy data, side effects, and cost. If you’d rather skip the clinic and treat bermuda grass allergy with at-home drops, see how Curex sublingual immunotherapy compares below.
What is Bermuda Grass?
The biology, taxonomy, and clinical fingerprint of Bermuda Grass — the foundation of how SCIT targets it.
Bermuda grass (Cynodon dactylon) seedhead releasing pollen — the dominant lawn and turf grass across the southern US, active March through November in Arizona and near-continuous in South Florida.
- Scientific name
- Cynodon dactylon
- Family
- Poaceae (Chloridoideae)Grass family — warm-season Chloridoideae
- Type
- Perennial warm-season grass pollen
- Native to
- East Africa / Mediterranean; now cosmopolitan in warm climates worldwide
- Allergen proteins
- Cyn d 1 (major) — Group 1 beta-expansin, >90% sensitizationCyn d 7 — polcalcin (pan-allergen)Cyn d 12 — profilin (pan-allergen)Cyn d 15Cyn d 22w — enolaseCyn d 23Cyn d 24
- Particle size
- 28–32 μm
- Avoidance difficulty
- Nearly impossible
How Bermuda Grass Allergy Presents
Symptoms by body system — useful for distinguishing Bermuda Grass sensitivity from overlapping allergies and infections.
Respiratory
- Persistent sneezing during outdoor activity from March through November
- Nasal congestion and rhinorrhea with year-round low-grade symptoms in deep South
- Wheezing and exercise-induced bronchospasm when mowing or playing outdoor sports
- Chronic cough from post-nasal drip during peak pollen months
- Asthma exacerbations linked to high pollen counts in Phoenix and Houston
Ocular
- Intense eye itching and redness when outdoors on warm sunny mornings
- Watery discharge and bilateral conjunctival injection during peak season
- Eyelid swelling after prolonged outdoor exposure
- Contact lens intolerance during high-pollen days
Dermal
- Contact urticaria after sitting or lying on Bermuda grass lawns
- Localized skin rash from rolling or playing on short-mowed turf
- Eczema flares during high-pollen spring and fall peaks
Systemic
- Fatigue and cognitive dulling during extended Bermuda pollen season
- Sleep disruption from nighttime nasal congestion
- Reduced outdoor exercise capacity during May–June pollen peaks
- Mood effects and reduced quality of life with multi-month seasonal burden
Bermuda is the allergen that exposes a critical gap in standard grass testing. When I see a patient from Houston or Phoenix who failed a Timothy-based regimen, the first thing I check is their Cyn d 1 level. If it's elevated with a low Phl p 5, they never needed Timothy monotherapy — they needed Bermuda on its own vial from the start.
When & Where Bermuda Grass Peaks
Allergen intensity by month and by state. Useful for timing SCIT start dates and travel planning.
12-Month Intensity
Peak: May–June across the Sun Belt; near-continuous in South Florida and the lower Rio Grande Valley· March–November in Arizona and Southern California; year-round at low levels in Miami-Dade and Key West
US Exposure Map
13 high-intensity statesWhat Bermuda Grass Cross-Reacts With
Patients sensitized to one allergen often react to others sharing similar proteins. This map shows the documented molecular overlaps.
Bermuda grass (Chloridoideae) shares Group 1 beta-expansin allergens with all grasses but cross-reacts only partially (~30–40% IgE inhibition) with the Pooideae cluster — a clinically critical gap that makes Bermuda sensitization distinct from Timothy or ryegrass allergy.
Chloridoideae subfamily — Group 1 homology; Bermuda extract provides empirical coverage for Buffalo
Chloridoideae — shares Group 1 architecture and Cyn d 1-like proteins with no Group 5
Panicoideae — partial Group 1 cross-reactivity but separate subfamily and separate vial needed
Is SCIT Right for Your Bermuda Grass Allergy?
Answer five questions to see whether Bermuda grass SCIT fits your clinical profile.
How severe are your Bermuda grass symptoms during peak season?
The Bermuda Grass SCIT Protocol
Bermuda grass SCIT uses an FDA-standardized extract available at 10,000 BAU/mL — the only warm-season grass extract with that designation, though its maximum concentration is one-tenth that of Timothy and other standardized grasses. Because Bermuda cross-reacts minimally with Pooideae grasses, it must be placed in a dedicated vial separate from any Timothy, ryegrass, or bluegrass components.
Injections begin at a highly dilute starting concentration and increase progressively toward the maintenance dose under 30-minute post-injection observation. The cluster protocol achieves maintenance in 8 visits — roughly half the standard timeline — with a comparable safety profile per Cox et al. (2011). Your allergist will titrate the Bermuda extract concentration individually based on skin test or serum IgE results.
Once the maintenance dose is reached, monthly injections sustain immune tolerance. Because Bermuda pollinates for up to 9 months in the Sun Belt, many patients receive maintenance injections year-round rather than following a traditional pre-seasonal build-up schedule. Your allergist will monitor symptom scores and medication use to assess year-over-year improvement.
Most patients who complete a full Bermuda SCIT course experience sustained symptom reduction for years after stopping injections — the hallmark of disease modification rather than symptom suppression. Some patients with ongoing high occupational or residential exposure opt to continue maintenance indefinitely in consultation with their allergist.
Extract Concentration Ladder
You progress through each vial during build-up. Concentration increases ~10x per step.
What the Research Shows for Bermuda Grass SCIT
Bermuda grass SCIT has more direct RCT evidence than any other warm-season grass extract — a 32-week randomized placebo-controlled trial specifically testing Cynodon dactylon extract.
- Nasal symptom score reduction51%Tabar et al., 2005, J Investig Allergol Clin Immunol, N=40
- Medication score reduction (pediatric, 1-yr retrospective)40%Multiple regional retrospective series cited in Cox 2011 JACI Practice Parameter
- IgE-sensitization prevalence in South-Central US clinics58%López et al., 2019, Ann Allergy Asthma Immunol — 27–58% range across Sun Belt clinics
Tabar et al. (2005) is the definitive Bermuda SCIT RCT, demonstrating 51% nasal symptom score reduction — a clinically meaningful effect size consistent with the broader grass SCIT meta-analysis literature (Calderón et al., 2007 Cochrane). The pediatric medication-score data and clinic-population sensitization prevalence figures reinforce the population-level burden and treatment responsiveness.
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See if at-home allergy shots fit your allergies — a 2-minute quiz, designed by board-certified allergists, with flat monthly pricing and no clinic visits.
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- 50K+Patients treated
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Bermuda Grass SCIT Side Effects
Bermuda grass SCIT carries the same local and systemic reaction profile as other inhalant SCIT extracts. Reactions are managed by the 30-minute post-injection observation period required at every visit.
Local reactions
4 documentedSystemic reactions
4 documentedNo deaths from inhalant SCIT have been reported in the US in the past decade under proper protocols. Bermuda SCIT safety data are consistent with the broader SCIT safety literature, with the 10,000 BAU/mL maximum concentration contributing to a conservative dose ceiling. Curex preserves that safety profile at home with a USP <797> serum, Zoom-supervised first dose and dose changes, a prescribed epinephrine auto-injector confirmed on hand, and allergist-overseen escalation.
SCIT vs Alternatives for Bermuda Grass
Bermuda grass-sensitized Sun Belt patients have four main treatment pathways: SCIT with a Bermuda-specific vial, at-home SLIT drops, avoidance strategies, or year-round symptom management medications.
| Criterion | At-Home SCIT (Curex)Best | SLIT drops/tablets | Avoidance | Medications |
|---|---|---|---|---|
| Effectiveness | 51% nasal symptom reduction (Tabar 2005 RCT) | Moderate — no Bermuda-specific approved tablet; custom drops | Minimal — near-impossible in Sun Belt | Symptom suppression only |
| 5-yr cost | $3,500–$10,000 | $1,500–$4,000 | Low direct cost | $500–$3,000 |
| Duration | 3–5 years | 3–5 years | Ongoing | Indefinite daily use |
| Convenience | At-home self-injection; weekly build-up → monthly | Daily drops at home | High lifestyle burden | Easy — oral/nasal |
| Safety | <0.01% anaphylaxis; Zoom-supervised dosing + prescribed epi | Very low systemic risk | Excellent | Generally safe; drowsiness risk |
| Lasting effect | 7–12+ years post-course | Moderate lasting effect | No disease modification | None — symptoms return off medication |
At-Home SCIT (Curex)Best
SLIT drops/tablets
Avoidance
Medications
SCIT with a dedicated Bermuda vial is the only disease-modifying option with published RCT data for Cynodon dactylon sensitization. Curex delivers that SCIT as an at-home allergy shot at $129/month — a serum that can include Bermuda alongside other warm-season grasses, compounded under USP <797>, with the first dose and every dose change supervised live over Zoom, a prescribed epinephrine auto-injector confirmed on hand, and allergist-overseen escalation — the RCT-backed modality, now fitting the Sun Belt lifestyle without weekly clinic visits.
What Bermuda Grass SCIT Actually Costs
Most major US insurers cover Bermuda grass SCIT under standard allergy benefits when prescribed by a board-certified allergist following positive skin or serum IgE testing. Because Bermuda has an FDA-standardized extract, prior authorization is typically straightforward; out-of-pocket costs depend on individual deductible and co-insurance structure. Curex's at-home testing can document Cyn d 1 sensitization as the clinical basis for coverage.
Cost range varies by deductible, co-insurance, and clinic.
Verify these codes with your insurer to confirm coverage.
Flat monthly subscription — includes consult, prescription, and at-home dosing for sublingual immunotherapy.
See if you qualifyStop guessing about your bermuda grass allergy. Get a plan.
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Bermuda Grass SCIT — Frequently Asked
Quick answers to the questions patients ask most before starting treatment.
Standard SCIT regimens typically use Timothy grass (Phleum pratense) as the primary Pooideae representative. Timothy contains Group 5 (Phl p 5) allergens that anchor cross-reactivity across temperate grasses. Bermuda lacks Group 5 entirely — its major allergen Cyn d 1 (Group 1 beta-expansin) has unique epitopes not present in Timothy. A patient sensitized primarily to Cyn d 1 will see less than 40% IgE inhibition from Timothy extract alone (Weber, 2003, Ann Allergy Asthma Immunol). For effective SCIT, Bermuda must be placed in a separate vial, and a component-resolved diagnostic test showing elevated Cyn d 1 with low Phl p 5 is the clinical signal that confirms primary Bermuda sensitization rather than Pooideae sensitization.
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.