Mountain Cedar Allergy Shots: Conquering Texas Cedar Fever
Mountain cedar allergy shots (SCIT) are the established standard of care for refractory cedar fever in central Texas — where Juniperus ashei produces the highest tree-pollen counts recorded anywhere in the US, up to 32,000 grains per cubic meter. Jun a 1, the major allergen, is characterized down to crystal structure and cross-protects the entire Cupressaceae family.
Mountain Cedar Allergy Immunotherapy: How It Works
Allergy immunotherapy is the only long-term treatment that re-trains the immune system to stop overreacting to mountain cedar — rather than just masking symptoms with antihistamines or steroids. By gradually exposing the body to controlled doses of mountain cedar 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 mountain cedar 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 mountain cedar 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 mountain cedar 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 mountain cedar 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 mountain cedar 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 mountain cedar allergy with at-home drops, see how Curex sublingual immunotherapy compares below.
What is Mountain Cedar?
The biology, taxonomy, and clinical fingerprint of Mountain Cedar — the foundation of how SCIT targets it.
Juniperus ashei male cones releasing pollen in the Texas Hill Country during peak cedar fever season, December through February.
- Scientific name
- Juniperus ashei
- Family
- CupressaceaeCypress family
- Type
- Winter tree pollen
- Native to
- Central Texas Hill Country, southern Oklahoma, southwestern Missouri, northern Mexico
- Allergen proteins
- Jun a 1 (major) — pectate lyase, ~43 kDa, >90% IgE reactivityJun a 2 — polygalacturonase, ~43 kDa, minorJun a 3 — thaumatin-like protein (PR-5), ~30 kDa, ~30%Jun a 7 — gibberellin-regulated protein, ~7 kDa, minor
- Particle size
- ~22 μm
- Avoidance difficulty
- Nearly impossible
How Mountain Cedar Allergy Presents
Symptoms by body system — useful for distinguishing Mountain Cedar sensitivity from overlapping allergies and infections.
Respiratory
- Severe nasal congestion and profuse rhinorrhea during peak pollen release
- Sneezing episodes triggered by entering cedar-heavy outdoor areas
- Chronic postnasal drip and throat irritation throughout December–February
- Asthma exacerbations in sensitized patients at the highest pollen counts
- Sinus pressure and facial pain from prolonged nasal inflammation
Ocular
- Intense eye itching and watering (allergic conjunctivitis) during cedar season
- Bilateral eyelid swelling and periorbital edema at peak count days
- Photophobia and blurred vision from heavy tearing
- Persistent redness and burning sensation throughout the season
Dermal
- Facial flushing during high-exposure outdoor days
- Contact urticaria in patients who handle cedar wood or foliage
- Generalized skin itching during peak pollen days in highly sensitized individuals
Systemic
- Profound fatigue — cedar fever's hallmark systemic feature distinguishing it from a common cold
- Low-grade fever and body aches during the peak two-week pollen burst
- Cognitive fog and sleep disruption from heavy nasal blockage
- Diminished quality of life scores comparable to moderate flu during January peak
Dr. Dale Mohar of Kerrville, Texas said it plainly about cedar season counts: 'I quit counting at 20,000 because there's really no point. I just say 20,000-plus and call it a day.' For patients who fail antihistamines and nasal steroids in that environment, SCIT is not optional — it is the standard of care.
When & Where Mountain Cedar Peaks
Allergen intensity by month and by state. Useful for timing SCIT start dates and travel planning.
12-Month Intensity
Peak: late December through January; secondary peak early February· ~10 weeks of intense exposure (December–mid-February); counts can exceed 32,000 grains/m³
US Exposure Map
2 high-intensity statesWhat Mountain Cedar Cross-Reacts With
Patients sensitized to one allergen often react to others sharing similar proteins. This map shows the documented molecular overlaps.
Mountain cedar's major allergen Jun a 1 (pectate lyase) shares >75% sequence identity with the equivalent allergen in every other clinically important Cupressaceae species, making it the anchor for whole-family cross-protection in SCIT — a patient treated with mountain-cedar extract is simultaneously building tolerance to red cedar, Arizona cypress, bald cypress, and Japanese cedar.
Cup a 1 shares >75% sequence identity and >95% similarity with Jun a 1 (Midoro-Horiuti 1999)
Jun v 1 shares >80% sequence identity with Jun a 1 (Midoro-Horiuti 1999, JACI)
Cross-reactivity by IgE inhibition documented (Ramirez & Lockey, Ann Allergy Asthma Immunol 2012)
Jun a 3 thaumatin-like cross-reactivity; affects sensitized subset only
Jun a 3 thaumatin-like cross-reactivity; mild OAS symptoms in a subset
Cedar-Fruit Syndrome (Thaumatin-Like Cross-Reactivity)
A subset of mountain-cedar-sensitized patients with IgE to Jun a 3 (the thaumatin-like minor allergen) may experience mild oral allergy syndrome with certain fruits. Symptoms are typically limited to the mouth and throat and are much less prominent than in birch-pollen OAS.
Is SCIT Right for Your Mountain Cedar Allergy?
Answer five questions to see how well mountain-cedar SCIT fits your clinical profile.
How severe are your mountain-cedar (cedar fever) symptoms each December–February?
The Mountain Cedar SCIT Protocol
Mountain-cedar SCIT uses a non-standardized extract anchored to Jun a 1 pectate lyase. Your allergist will titrate the concentration and injection schedule based on your sensitization level and local pollen calendar — many central Texas clinicians begin build-up in late summer to reach maintenance before December.
The extract concentration is increased incrementally from the most dilute vial through progressively stronger doses. High-pollen-burden patients may use an accelerated (rush or cluster) schedule to reach maintenance before December cedar season begins. With at-home SCIT through Curex, the first injection and every dose increase are supervised live over Zoom by the prescribing allergist, with a prescribed epinephrine auto-injector confirmed on hand and a 30-minute self-observation after each injection.
Once the target maintenance dose is reached, injections shift to monthly. Jun a 1-specific IgE typically declines and IgG4 blocking antibodies rise over 12–18 months, producing the measurable symptom reduction reported in observational studies (Goetz; Ramirez & Lockey 2012). Continued 30-minute observation after each injection.
After completing 3–5 years of maintenance, your allergist will assess whether durable tolerance has been established. Many cedar-allergic patients in Texas experience lasting benefit for several years post-SCIT, though the duration of protection varies and some patients require extended courses.
Extract Concentration Ladder
You progress through each vial during build-up. Concentration increases ~10x per step.
What the Research Shows for Mountain Cedar SCIT
Mountain-cedar SCIT is supported by observational data and small controlled trials — enough to establish it as standard of care in central Texas, but without the large modern US RCT that exists for ragweed or timothy. Cross-protection across the Cupressaceae family is well-established via >75% Jun a 1 sequence identity.
- Symptom score improvement (observational)70%Goetz DW — observational series of mountain-cedar SCIT in Texas Hill Country patients showing substantial symptom reduction
- Jun a 1 / Jun v 1 sequence identity (cross-protection basis)80%Midoro-Horiuti T et al., J Allergy Clin Immunol 1999;104:608–612 and 104:613–617 — molecular characterization of Jun a 1 and cross-species homology
- Jun a 1 IgE reactivity in cedar-allergic patients90%WHO/IUIS allergen.org — >90% of cedar-allergic patients have IgE to Jun a 1
- Cupressaceae family cross-protection (Cup a 1 similarity)95%Midoro-Horiuti 1999 JACI — >95% similarity between Jun a 1 and Cup a 1 (Arizona cypress)
No large randomized controlled trial specific to mountain-cedar SCIT has been published as of 2025 — a significant evidence gap given that cedar fever is arguably the most severe single-pollen event in the United States. Clinical benefit is well-documented in observational series and small controlled trials (Goetz; Ramirez & Lockey, Ann Allergy Asthma Immunol 2012), and the molecular basis for family-wide cross-protection is among the strongest in tree-pollen immunology. SCIT remains the recommended intervention per AAAAI/ACAAI Practice Parameters for patients with refractory cedar fever.
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Mountain Cedar SCIT Side Effects
Mountain-cedar SCIT carries a side-effect profile consistent with inhalant allergen immunotherapy generally — local injection-site reactions are common and expected, while serious systemic reactions are rare when proper protocols are followed.
Local reactions
4 documentedSystemic reactions
4 documentedMountain-cedar SCIT has traditionally been administered in an allergy office with epinephrine and resuscitation equipment available; for eligible maintenance patients, Curex makes safe at-home self-administration possible with a personalized serum sterile-compounded to USP <797>, a prescribed epinephrine auto-injector confirmed on hand, and the first dose and every dose change supervised live over Zoom by a board-certified allergist. A 30-minute self-observation follows every dose and captures the vast majority of systemic reactions. No fatalities from SCIT have been reported in the US in the past decade under proper observation protocols (Greenhawt et al., Ann Allergy Asthma Immunol 2023 JTF guidelines).
SCIT vs Alternatives for Mountain Cedar
Mountain-cedar-allergic patients have four main options: SCIT — the established standard of care for refractory cedar fever, now available as a weekly at-home shot through Curex — sublingual (SLIT) drops, rigorous avoidance during December–February, or daily antihistamines and nasal steroids.
| Criterion | SCITBest | SLIT | Avoidance | Medications |
|---|---|---|---|---|
| Effectiveness | Strongest for refractory cedar fever; standard of care in Texas | Emerging evidence; less data than SCIT for cedar specifically | Impractical in cedar-endemic areas; counts 20,000+ grains/m³ | Good for mild-moderate; often inadequate at peak cedar counts |
| 5-yr cost | $3,500–$15,000 over 5 years | $39–$150/month depending on provider | Low cost but high lifestyle burden | $300–$1,200/year for prescriptions |
| Duration | 3–5 years weekly then monthly | 3–5 years daily drops | Permanent lifestyle restriction | Lifelong daily use |
| Convenience | Weekly at-home self-injection for ~6 months with Curex; first dose and dose changes supervised live over Zoom | At-home; no clinic visits needed | HEPA filtration helps indoors; outdoor avoidance nearly impossible in Texas | Daily pills and nasal sprays; convenient |
| Safety | Excellent; rare systemic reactions, with a sterile-compounded serum, a prescribed epinephrine auto-injector on hand, and live Zoom supervision of every dose change | Lower systemic reaction risk vs SCIT | No treatment risk; no disease modification | Well-established safety profile |
| Lasting effect | Years of lasting benefit after completing course | Duration of benefit still being studied | No lasting benefit; symptoms return with exposure | No lasting benefit; symptoms return when medications stop |
SCITBest
SLIT
Avoidance
Medications
For mild cedar fever, daily antihistamines and nasal steroids are reasonable first-line therapy. For patients with moderate-to-severe symptoms who fail pharmacotherapy — the clinical reality for many central Texas residents at peak counts — SCIT is the established standard of care, now available from Curex as a weekly at-home allergy shot at $129/month, with a serum sterile-compounded to USP <797>, a prescribed epinephrine auto-injector confirmed on hand, and the first dose and every dose change supervised live over Zoom by a board-certified allergist. Sublingual drops remain a general allergy modality offered by some providers for patients who prefer a needle-free option.
What Mountain Cedar SCIT Actually Costs
Most major US insurers cover mountain-cedar SCIT under standard allergy benefits when prescribed by a board-certified allergist; in Texas, cedar fever SCIT is among the most commonly approved immunotherapy courses. Actual out-of-pocket cost depends on your deductible, co-insurance, and whether your allergist is in-network. Curex at-home IgE testing identifies specific mountain cedar 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.
Flat monthly subscription — includes consult, prescription, and at-home dosing for sublingual immunotherapy.
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Mountain Cedar SCIT — Frequently Asked
Quick answers to the questions patients ask most before starting treatment.
Most mountain-cedar SCIT patients notice meaningful symptom improvement during their first cedar season after reaching maintenance dose — typically 6–9 months after starting the build-up phase. The immunologic mechanism involves a shift from IgE-mediated responses toward IgG4 blocking antibodies and regulatory T-cell tolerance, a process that unfolds over 12–18 months of treatment. Some patients with particularly high Jun a 1 sensitization may need two full cedar seasons to experience the full benefit. A board-certified allergist can track your progress using symptom-medication diaries and follow-up serology.
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.