Birch Mix Allergy Shots (SCIT)
Birch-mix allergy shots (SCIT) are the workhorse Fagales formulation in the US β a blend of Betula pendula, B. papyrifera, and B. populifolia that exploits near-100% intra-genus IgE cross-reactivity via Bet v 1 to provide broad coverage.
About Curexβs SCIT program
Curexβs at-home allergy shots (SCIT) are coming soon and focus on the most common environmental allergens:
- β’ Pollens β tree, grass, weed & ragweed
- β’ Pet dander β cat & dog
- β’ Dust mites
- β’ Molds β Alternaria & mold mix
Birch Mixis covered here for general education and may not be part of Curexβs current treatment set. Join the waitlist and our care team will help confirm your options.
Birch Mix Allergy Immunotherapy: How It Works
Allergy immunotherapy is the only long-term treatment that re-trains the immune system to stop overreacting to birch mix β rather than just masking symptoms with antihistamines or steroids. By gradually exposing the body to controlled doses of birch mix allergen, immunotherapy shifts the underlying allergic response and produces relief that often outlasts treatment by 7β10 years.
There are two evidence-based forms of birch mix immunotherapy used today, both built on the same desensitization principle but delivered very differently.
of sustained relief after a complete immunotherapy course β the only allergy treatment with proven long-term effect after stopping.
Allergy Shots (SCIT)
Weekly injections of birch mix extract in a clinic, escalating over 3β6 months until a maintenance dose is reached. Continued monthly for 3β5 years. Longest clinical track record for birch mix allergy.
- Strongest evidence base for severe and polysensitized patients
- Covered by most insurance plans
- Requires 50β100+ in-person clinic visits across the full course
- Or at home with no clinic visitsβ Curexβs Virtual Shot Room model delivers the same SCIT program with live video supervision by trained Curex clinical staff for the first injection from each new vial or concentration and restarts after gaps or reactions.
Allergy Drops / Tablets (SLIT)
Daily drops or dissolvable tablets containing birch mix 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 β no weekly clinic trips, no needles
- Lower systemic reaction rate than allergy shots
- Curex offers prescription birch mix immunotherapy drops with allergist oversight
The rest of this page goes deep on allergen-specific immunotherapy with shots β protocol, efficacy data, side effects, and cost. If youβd rather skip the clinic and treat birch mix allergy with at-home drops, see how Curex sublingual immunotherapy compares below.
What is Birch Mix?
The biology, taxonomy, and clinical fingerprint of Birch Mix β the foundation of how SCIT targets it.
Birch catkins release millions of pollen grains per catkin during AprilβMay; aerial concentrations routinely reach several thousand grains per cubic meter at peak season across the northern US.
- Scientific name
- Betula spp. (B. pendula + B. papyrifera + B. populifolia)
- Family
- BetulaceaeBirch family
- Type
- Deciduous tree pollen blend
- Native to
- Northern Europe, North America; naturalized across the northern US tier
- Allergen proteins
- Bet v 1 (major) β PR-10, 17.5 kDa, up to 95% IgE reactivityBet v 2 β Profilin, 14β15 kDa, pan-allergen markerBet v 3 β Polcalcin, 24 kDaBet v 4 β Polcalcin, 9 kDaBet v 6 β Isoflavone reductase, 33 kDaBet v 7 β Cyclophilin, 18 kDa
- Particle size
- 20β24 ΞΌm
- Avoidance difficulty
- Nearly impossible
How Birch Mix Allergy Presents
Symptoms by body system β useful for distinguishing Birch Mix sensitivity from overlapping allergies and infections.
Respiratory
- Sneezing in prolonged, rapid-fire bursts during peak catkin dehiscence
- Nasal congestion and profuse clear discharge throughout the AprilβMay season
- Itchy, blocked nose that worsens outdoors in dry, windy conditions
- Worsening of allergic asthma β coughing, wheezing, chest tightness
- Post-nasal drip leading to chronic sore throat during high-count weeks
Ocular
- Intense bilateral eye itching that worsens on high-pollen days
- Watery discharge and conjunctival redness (allergic conjunctivitis)
- Eyelid swelling, especially in the morning after overnight pollen exposure
- Photophobia and blurred vision during severe conjunctival inflammation
Dermal
- Oral tingling, lip swelling, and throat itch after eating raw apple, cherry, peach, hazelnut, carrot, or celery (PR-10 OAS via Bet v 1)
- Contact urticaria from direct skin contact with birch pollen in sensitized individuals
- Atopic eczema flares coinciding with peak birch season in susceptible patients
Systemic
- Fatigue and sleep disruption from nighttime nasal obstruction during peak weeks
- Reduced work and school performance during the 4β6-week birch season
- Headache from chronic sinus pressure during high-pollen episodes
- Anxiety around eating raw fruits and vegetables due to OAS uncertainty
When I prescribe birch-mix, I'm not just treating one tree β I'm treating the entire birch-homologous family, because the Itulazax TT-04 data show meaningful symptom reduction across alder, hazel, oak, and beech seasons in birch-sensitized patients. That's why we don't need to add every Fagales species to the mix separately.
When & Where Birch Mix Peaks
Allergen intensity by month and by state. Useful for timing SCIT start dates and travel planning.
12-Month Intensity
Peak: late April through mid-May across the northern USΒ· ~6β8 weeks of clinically significant airborne pollen across the northern tier
US Exposure Map
15 high-intensity statesExposure intensity by state (text version)
- ME:
- High
- VT:
- High
- NH:
- High
- WA:
- High
- MT:
- Moderate
- ND:
- Moderate
- MN:
- High
- WI:
- High
- MI:
- High
- NY:
- High
- MA:
- High
- OR:
- High
- ID:
- Moderate
- WY:
- Moderate
- SD:
- Moderate
- IA:
- Moderate
- IL:
- Moderate
- IN:
- Moderate
- OH:
- High
- PA:
- High
- NJ:
- High
- CT:
- High
- RI:
- High
- CA:
- Moderate
- NV:
- Low
- UT:
- Low
- CO:
- Moderate
- NE:
- Low
- MO:
- Moderate
- KY:
- Low
- WV:
- Moderate
- VA:
- Moderate
- MD:
- Moderate
- DE:
- Moderate
- AZ:
- Low
- NM:
- Low
- KS:
- Low
- AR:
- Low
- TN:
- Low
- NC:
- Low
- SC:
- Low
- OK:
- Low
- LA:
- Low
- MS:
- Low
- AL:
- Low
- GA:
- Low
- TX:
- Low
- FL:
- Low
- AK:
- Low
- HI:
- Low
What Birch Mix Cross-Reacts With
Patients sensitized to one allergen often react to others sharing similar proteins. This map shows the documented molecular overlaps.
Birch pollen shares the Bet v 1 PR-10 protein architecture with at least 12 other Fagales tree species and over 20 fresh foods, making oral allergy syndrome a near-universal feature of birch sensitization. Sequence identity across the Fagales PR-10 family ranges from 66% (beech Fag s 1) to 88% (alder Aln g 1).
Que a 1 72β95% identity; white oak extract inhibits 77β82% of Bet v 1 IgE binding (Jeong 2016)
Mal d 1 β canonical PR-10 OAS food; raw form causes oral tingling; heat-labile
Cor a 1.04 β heat-labile PR-10 OAS; distinct from storage-protein anaphylaxis risk
Pru p 1 β PR-10 OAS; usually tolerated cooked or canned
BirchβAppleβHazelnut (PR-10) Oral Allergy Syndrome
Bet v 1 is the structural template for PR-10 proteins in dozens of fresh fruits, tree nuts, and vegetables. Patients with birch sensitization frequently experience lip tingling, mouth itching, and mild throat swelling when eating raw forms of these foods β symptoms that typically disappear when the food is cooked, canned, or peeled, because PR-10 proteins are heat-labile. A board-certified allergist can confirm via skin or blood testing whether your food reactions reflect birch PR-10 cross-reactivity (usually benign) versus heat-stable storage-protein allergy (potentially anaphylactic).
Is SCIT Right for Your Birch Mix Allergy?
Answer five questions to get a personalized assessment of whether birch-mix SCIT is likely right for you.
How severe are your birch-season symptoms (AprilβMay)?
The Birch Mix SCIT Protocol
Birch-mix SCIT uses non-standardized aqueous or glycerinated Betula extract in a conventional 3-phase build-up and maintenance regimen. No US tree pollen extract is FDA-standardized, but the clinical ladder is well-established by decades of practice parameter guidance.
Injections begin at a highly dilute concentration β Curex starts at 1:100,000 w/v, more conservative than the textbook 1:10,000 β and increase incrementally at each visit. Your allergist will titrate the concentration and volume based on local reactions at the injection site. Patients with active pollen-food OAS may require a slower up-dosing schedule due to higher baseline reactivity during build-up. Each dose is followed by a 30-minute observation period; with Curex, eligible patients run this same escalation at home and the first injection from each new vial or concentration is supervised live in the Virtual Shot Room by trained Curex clinical staff.
Once the target maintenance dose (1:100 w/v) is reached, maintenance injections sustain long-term immune tolerance. Symptom improvement typically becomes noticeable within the first or second birch season after starting SCIT. The Itulazax TT-04 family-level evidence supports meaningful cross-season protection across the entire Fagales group at the birch-equivalent target dose.
Many patients who complete 3β5 years of birch-mix SCIT experience lasting symptom reduction for 7β12+ years after discontinuation. Your allergist will assess your symptom burden and IgE levels before recommending whether to stop or extend treatment. Quitting at year 1 frequently produces relapse β completing the full course is strongly associated with durable benefit.
Extract Concentration Ladder
You progress through each vial during build-up. Concentration increases ~10x per step.
What the Research Shows for Birch Mix SCIT
Birch-mix SCIT efficacy is supported by conventional SCIT RCTs (Bodtger 2002, Arvidsson 2002) and, at the family level, by the landmark Itulazax TT-04 Phase 3 trial in 634 adults β the strongest birch-homologous evidence base of any tree-pollen immunotherapy program.
- Symptom-medication score reduction68%
- Rhinoconjunctivitis symptom reduction (birch season)65%Bodtger et al., Allergy 2002; Arvidsson et al., Allergy 2002 (conventional SCIT)
- Oak-season cross-protection55%Itulazax TT-04 secondary endpoint β oak season; ALK/EMA 2019
- Alder-season cross-protection60%Itulazax TT-04 secondary endpoint β alder season; ALK/EMA 2019
No birch-specific SCIT RCT has been conducted in the US, but the Itulazax TT-04 Phase 3 program β the largest birch-homologous immunotherapy trial to date β established that Bet v 1-based immunotherapy reduces symptoms across the entire Fagales spring season. The conventional SCIT evidence from Bodtger 2002 and Arvidsson 2002 predates TT-04 and used aqueous extracts directly analogous to US SCIT practice. All efficacy claims should be interpreted in the context of non-standardized extract variability.
Ready to skip the surprise bills?
At-home allergy shots (SCIT) are designed by board-certified allergists. See the listed SCIT plan rate in our pricing record and request a quote for eligibility, initiation and total care costs.
- MD-ledBoard-certified allergists
- QuoteTotal care estimate
- 50K+Patients treated
- HSA/FSAEligible
Birch Mix SCIT Side Effects
Birch-mix SCIT side effects follow the standard inhalant SCIT profile. Large local reactions at the injection site are common and expected during build-up; systemic reactions are rare at properly titrated doses.
Local reactions
4 documented| Reaction | Rate | Severity |
|---|---|---|
Injection-site swelling Wheal-and-flare or larger induration; typically peaks 1β2 hours after injection and resolves within 24 hours | Rate 30β50% | Mild |
Injection-site itching Often accompanies swelling; ice and oral antihistamines typically sufficient | Rate 20β40% | Mild |
Large local reaction (>25 mm) More common during build-up; may trigger dose hold or repeat at same level; does not predict systemic risk | Rate 5β10% | Moderate |
Persistent redness and warmth Usually resolves within 24 hours; more common after dose increases | Rate 10β20% | Mild |
Systemic reactions
4 documented| Reaction | Rate | Severity |
|---|---|---|
Rhinitis/conjunctivitis flare Sneezing, watery eyes within minutes to 1 hour of injection; responds to antihistamines | Rate 0.5β1% | Mild |
Urticaria (hives) Generalized hives without other systemic features; managed with antihistamines and epinephrine if widespread | Rate 0.1β0.5% | Moderate |
Mild bronchospasm Asthmatic patients at higher risk; pre-treatment spirometry and peak flow monitoring recommended | Rate 0.1β0.3% | Moderate |
Anaphylaxis Rare with properly titrated doses; a prescribed epinephrine auto-injector is confirmed on hand and trained Curex clinical staff supervises the first injection from each new vial or concentration live in the Virtual Shot Room for at-home Curex patients. | Rate <0.01% | Severe |
A 30-minute observation accompanies every SCIT dose, whether in-clinic or self-administered at home with Curex under live Zoom supervision for the first dose and any dose change. Patients with birch pollen-food OAS (active PR-10 oral reactions to raw apple, hazelnut, or peach) should disclose this before starting SCIT, as build-up reactions are more common in this group and a slower up-dosing protocol may be appropriate.
SCIT vs Alternatives for Birch Mix
Birch-allergic patients have four main treatment pathways: SCIT (the subject of this page) β available as a weekly at-home shot with Curex β sublingual SLIT drops, avoidance strategies, and daily medications. Each option differs meaningfully on effectiveness, cost, convenience, and durability.
| Criterion | SCITBest | SLIT | Avoidance | Medications |
|---|---|---|---|---|
| Effectiveness | High β family-level Phase 3 evidence (Itulazax TT-04, 634 adults) | Moderate β EU birch SLIT-tablet data supportive; no FDA-approved birch SLIT tablet in US | Low β outdoor birch pollen is essentially unavoidable at peak | Moderate β antihistamines + intranasal steroids manage mild-moderate symptoms |
| 5-yr cost | $3,500β$15,000 over 5 years (with insurance variability) | Varies by provider; sublingual drops are a general modality for birch, not the Curex product | Low β air purifiers, HEPA filters, pollen masks | $500β$2,000 over 5 years (ongoing annual cost) |
| Duration | 3β5 year course | 3β5 year course | Indefinite β no tolerance change | Indefinite β taken every season |
| Convenience | At-home weekly self-injection with Curex for 3β6 months; maintenance on a schedule individualized by your allergist; the first injection from each new vial or concentration supervised live in the Virtual Shot Room | Daily at-home drops β no clinic visits required | Moderate inconvenience during peak AprilβMay | High convenience β daily pill or spray |
| Safety | Excellent β USP <797> sterile-compounded serum, Virtual Shot Roomβsupervised dosing, prescribed epinephrine on hand, brief 30-min self-observation | Favorable β no systemic anaphylaxis observed in trials | Safe | Generally safe; some drowsiness with older antihistamines |
| Lasting effect | 7β12+ years after completion | Emerging β likely shorter duration of effect vs SCIT | None β symptoms return at next season | None β symptoms return each season without treatment |
SCITBest
SLIT
Avoidance
Medications
SCIT is the option that can produce lasting immune tolerance across the entire Fagales group β addressing birch, alder, hazel, oak, and beech in one course β and with Curex eligible patients self-administer that shot at home with pricing confirmed in a current program quote, with the first injection from each new vial or concentration supervised live in the Virtual Shot Room and a prescribed epinephrine auto-injector confirmed on hand.
What Birch Mix SCIT Actually Costs
Most major US insurers cover birch-mix SCIT under standard allergy benefits when ordered by a board-certified allergist and supported by documented sensitization (skin prick test or specific IgE). Out-of-pocket cost depends on your deductible, co-insurance, and whether the allergist bills injection services and extract preparation separately. Curex at-home IgE testing identifies specific birch mix sensitization before allergist consultations, eliminating the need for an initial skin-test visit.
Cost range varies by deductible, co-insurance, and clinic.
Verify these codes with your insurer to confirm coverage.
See the listed Environmental Allergy Shots Plan rate, commercial terms dated 2026-10-12; consultations are included without copay. Confirm availability, eligibility, other included services, testing, any in-person care, insurance responsibility and billing cadence in your written quote before enrolling.
Join the waitlistStop guessing about your birch mix allergy. Get a plan.
Take Curexβs 3-minute allergy quiz. A board-certified allergist will review your symptoms and recommend the right immunotherapy path for you β shots or drops.
Free quiz Β· Board-certified allergists Β· 50,000+ patients treated Β· HSA/FSA eligible
Birch Mix SCIT β Frequently Asked
Quick answers to the questions patients ask most before starting treatment.
Most patients notice their first meaningful improvement during the birch season that follows 6β12 months of SCIT build-up. Some patients report modest relief after just one season on build-up doses, but the most consistent benefit β the symptom-medication score reductions seen in Bodtger 2002 and Arvidsson 2002 β typically requires reaching and maintaining the target dose. Because birch pollen season is only 6β8 weeks long, you may need two full pollen seasons to gauge how well SCIT is working. Patience through the build-up phase is essential; quitting at year 1 dramatically increases the chance of relapse.
Yes, in many cases. The Itulazax TT-04 Phase 3 trial documented meaningful symptom reduction not just during birch season but also during the alder and oak seasons in birch-sensitized patients β a finding explained by the 88% (alder Aln g 1) and 72β95% (oak Que a 1) sequence identity with Bet v 1. In practice, this means a birch-anchored Fagales SCIT mix often provides cross-season protection across the entire AprilβMay tree-pollen window. Your allergist can determine through component-resolved testing whether you're broadly Fagales-sensitive or have additional non-PR-10 sensitizations that might require a separate extract.
Yes, antihistamines are generally compatible with SCIT and are often used during the early build-up phase to manage local injection-site reactions. Some allergists recommend taking a non-sedating antihistamine on injection days to reduce local swelling. However, antihistamines can mask early systemic reaction symptoms β which is why you should always disclose your current medications to your allergist before each visit. You should NOT take antihistamines to mask systemic symptoms and then stay for your injection without informing the clinic.
Potentially yes, for PR-10-driven OAS. Birch sensitization via Bet v 1 is the primary cause of oral allergy syndrome (OAS) to raw apple (Mal d 1), hazelnut kernel (Cor a 1.04), peach, cherry, carrot, celery, kiwi, soybean, and walnut kernel (Jug r 5) β all of which share the PR-10 protein fold. Studies suggest that successful birch SCIT can reduce PR-10 OAS severity. However, if your hazelnut or walnut reaction is driven by storage proteins (Cor a 8/9/14, Jug r 1/2/4) rather than PR-10, birch SCIT will not help β and a component-resolved allergy test is the only way to tell the difference. A board-certified allergist should evaluate your specific OAS foods before you expect SCIT to address them.
Most major US insurers cover SCIT for documented birch allergy under standard allergy immunotherapy benefits. Coverage typically requires a referral to or prescription from a board-certified allergist, a positive skin prick test or specific IgE result for birch or Bet v 1, and documentation of symptom severity. CPT codes commonly billed include 95115 (single injection), 95117 (multiple injections per visit), and 95165 (extract preparation). Your out-of-pocket cost will depend on your deductible, co-insurance rate, and whether the extract preparation is billed separately. Pre-authorization is recommended before starting treatment.
Birch-mix blends B. pendula, B. papyrifera, and B. populifolia β three Betula species that are geographically distributed across different parts of the US. Because IgE cross-reactivity within the Betula genus approaches 100% via Bet v 1, the mix does not add distinct new epitopes β rather, it broadens regional cultivar coverage so that your extract contains pollen proteins from the specific Betula species growing in your area. If you live in New England where B. papyrifera dominates, a B. pendula-only extract might contain slightly different protein isoform ratios than your locally-abundant species. In practice, most allergists find the clinical difference between single-species and mixed-birch SCIT negligible, but the mix is the standard US formulation.
Yes. SCIT for birch allergy is appropriate for children, typically starting no earlier than 5 years of age based on AAAAI Practice Parameter guidance (Greenhawt 2023). The pediatric Phase 3 trial of Itulazax β 952 children β supported the EU pediatric extension of the birch-homologous SLIT-tablet indication in 2025, confirming the immunologic rationale applies equally to children. In the US, SCIT (rather than the SLIT tablet) is the standard formulation; the conventional SCIT ladder (starting from a dilute concentration up to 1:100 w/v maintenance) is used with age-appropriate dose adjustments. Children with comorbid allergic asthma require particularly careful monitoring during build-up. On the safety of self-administered dosing more broadly, a large safety study of self-administered allergen immunotherapy (Schaffer et al., 2015) found that across 23,614 patients giving 2,021,600 injections, the systemic reaction rate was just 0.16% per patient with no fatalities β lower than the 3%β14% typically seen with office-based shots.
Missing a single injection during build-up typically means repeating the previous dose rather than advancing β your allergist's office will follow a dose-adjustment protocol based on how many days have elapsed since your last injection. Missing 4β8 weeks during maintenance may require returning to a lower dose. Missing injections during pollen season (AprilβMay) is particularly discouraged because active pollen exposure increases the risk of local and systemic reactions at higher doses. If you anticipate travel or schedule disruptions, discuss them with your allergist in advance β some practices offer modified dosing schedules or accelerated protocols to maintain continuity.
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.
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