Do Allergy Shots Have to Be Weekly? Build-Up vs. Maintenance
Allergy shots are weekly only during conventional SCIT build-up — 1–2 visits per week, single injection per visit, for approximately 24–28 visits over 3–6 months per Cox 2011 PP3. After build-up, maintenance shifts to every 2–4 weeks for 3–5 years. Cluster build-up compresses the weekly schedule to 4–8 weeks; rush compresses to 1–3 days. Curex delivers this same weekly SCIT at home for $129/month — the first dose and every dose change supervised live over Zoom — so eligible patients keep the schedule without the clinic trips. Tkacz 2021: 23.9% of patients never return after the first injection — the weekly clinic schedule is the dominant adherence chokepoint.
7 peer-reviewed sources
Allergy shots are weekly during conventional build-up only (24–28 weeks, 3–6 months). Maintenance shifts to every 2–4 weeks for 3–5 years. Cluster compresses build-up to 4–8 weeks; rush to 1–3 days. SLIT replaces the clinic schedule with daily home drops.
The essentials
Do allergy shots have to be weekly? The direct answer per Cox L, Nelson H, Lockey R et al., J Allergy Clin Immunol 2011;127(1 Suppl):S1–S55 (DOI 10.1016/j.jaci.2010.09.034): yes during conventional build-up, no during maintenance.
Weekly build-up per Cox 2011 PP3: 1–2 injections per week, single injection per visit, for approximately 24–28 visits over 3–6 months. Medicare LCD L36240 describes build-up as 'anywhere from 8–28 weeks to achieve a maintenance dose.' This is the schedule most US allergy clinics default to — it is the safest, most evidence-rich protocol, and the one where most patients fail: Tkacz JP et al., Curr Med Res Opin 2021;37(6):957–965 found that 23.9% of 103,207 MarketScan AIT patients never returned after the first injection and only 43.9% reached maintenance.
After build-up, maintenance per Cox 2011: every 2–4 weeks for 3–5 years. The weekly cadence does NOT continue into maintenance.
Curex pairs at-home IgE testing with board-certified allergist review to identify which allergens drive a patient's symptoms — then delivers the weekly SCIT itself as an at-home program for $129/month: a serum sterile-compounded to USP <797> standards, a prescribed epinephrine auto-injector confirmed on hand, and the first dose plus every dose change supervised live over Zoom, so the build-up and maintenance schedule no longer requires weekly office trips.
Alternatives that change the answer to 'do they have to be weekly': - Cluster build-up: 2–4 injections per visit at ≥30-minute intervals, reaching maintenance in 4–8 weeks (Tabar AI et al., JACI 2005;116:109–118 — equivalent efficacy, higher per-injection reaction risk) - Rush build-up: 1–3 days (Bernstein DI et al., JACI 2008 — systemic reaction rate up to >36% vs. <1% conventional per PMID 8977545) - Curex at-home SCIT: the same weekly shot self-administered at home for eligible patients, with no clinic schedule (SLIT tablets — Grastek, Oralair, Ragwitek, Odactra — are a separate FDA-approved sublingual modality dosed daily at home)
Missed-dose logic: per Cox 2011 PP3 interval-based dose-adjustment tables, build-up intervals are commonly 3–10 days. Exceeding approximately 10–14 days typically triggers a dose reduction — the prior lower dose is repeated before resuming escalation. A 30-minute observation applies to every injection: weekly build-up or monthly maintenance, with no difference in observation requirement — in the clinic by staff, or at home over Zoom for the first and every changed dose under the Curex model.
Ready to skip the surprise bills?
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.
- 4.8/5Patient rating
- $129/moFlat pricing
- 50K+Patients treated
- HSA/FSAEligible
Treatment timeline — phase by phase
Allergy shots are weekly during the build-up phase only. After build-up, the cadence extends significantly. Understanding all three phases — and the available alternatives — is the practical answer to 'do allergy shots have to be weekly.'
This is the only phase where shots are truly weekly. Dose escalates from the most dilute vial to approximately 0.5 mL of the maintenance concentrate over 24–28 visits per Cox 2011 PP3. Missed-dose rule: build-up intervals commonly 3–10 days; exceeding approximately 10–14 days triggers a dose reduction. Mandatory 30-min observation after every injection.
After reaching the maintenance dose, the interval extends to every 2–4 weeks. Most clinics anchor at 4 weeks (monthly). The 30-min observation continues unchanged. Durham SR et al., NEJM 1999;341:468–475 — 3 years of this phase yields 4 years of post-discontinuation remission.
Completing the full course produces the 4-year durable remission documented by Durham 1999 NEJM. PAT 10-year follow-up (Jacobsen 2007 Allergy) shows pediatric disease prevention at 10 years. No biomarker predicts relapse — discontinuation is clinical.
Same proven results. No clinic visits.
Curex's at-home allergy shots deliver the same allergen desensitization as clinic SCIT — for a flat $129/month, with no clinic visits and no facility fees.
See if at-home shots are right for youTreatment options side by side
Patients asking whether allergy shots have to be weekly are often implicitly asking whether there is a less demanding alternative. The comparison across schedules and modalities directly answers that question.
| Treatment | Efficacy | Duration | Cost (5yr) | Convenience | Safety |
|---|---|---|---|---|---|
Weekly SCIT (conventional build-up) | |||||
Cluster SCIT (4–8 week build-up) | |||||
At-home allergy shots (Curex SCIT — no weekly clinic trips) |
- Efficacy
- Duration
- Cost (5yr)
- Convenience
- Safety
- Efficacy
- Duration
- Cost (5yr)
- Convenience
- Safety
- Efficacy
- Duration
- Cost (5yr)
- Convenience
- Safety
For patients who cannot reliably attend weekly clinic visits during the 24+-week build-up, Curex delivers the same SCIT allergy shots at home for $129/month — a serum sterile-compounded to USP <797> standards, a prescribed epinephrine auto-injector confirmed on hand, and the first dose plus every dose change supervised live over Zoom by the prescribing allergist, with gradual week-by-week escalation matching the clinic protocol.
See if at-home shots are right for youFrequently asked questions
Do allergy shots have to be weekly?
Allergy shots are weekly only during conventional SCIT build-up — 1–2 visits per week for approximately 24–28 visits over 3–6 months per Cox L et al., J Allergy Clin Immunol 2011;127(1 Suppl):S1–S55 (DOI 10.1016/j.jaci.2010.09.034). After build-up, maintenance shifts to every 2–4 weeks for 3–5 years. The weekly schedule is not permanent. If weekly clinic visits are not feasible, options include cluster build-up (4–8 weeks, 2–4 injections per visit), rush build-up (1–3 days, higher reaction risk), or Curex's at-home SCIT program ($129/month), where the same weekly shot is self-administered at home for eligible patients with the first dose and every dose change supervised live over Zoom.
How long are allergy shots weekly for?
Allergy shots are weekly during the build-up phase — approximately 3–6 months for conventional SCIT per Cox 2011 PP3, involving 24–28 separate weekly visits with a single injection per visit. Medicare LCD L36240 describes build-up as 'anywhere from 8–28 weeks to achieve a maintenance dose.' The weekly cadence ends when the maintenance dose is reached — typically after 24–28 weekly visits — and then shifts to every 2–4 weeks for the 3–5-year maintenance phase. Cluster build-up compresses the weekly phase to 4–8 weeks with 2–4 injections per visit at ≥30-minute intervals per Tabar AI et al., JACI 2005;116:109–118.
What happens after the weekly build-up phase?
After completing the weekly build-up phase and reaching the target maintenance dose, allergy shots shift to every 2–4 weeks for 3–5 years of maintenance per Cox L et al., J Allergy Clin Immunol 2011;127(1 Suppl):S1–S55 (DOI 10.1016/j.jaci.2010.09.034). Most US clinics anchor on a 4-week (monthly) maintenance interval. The transition from weekly to monthly visits is typically one of the most welcome changes for patients who have tolerated the build-up burden. The 30-minute observation continues unchanged in maintenance. Long-term durability: Durham SR et al., NEJM 1999;341:468–475 — 3 years of maintenance yields 4 years of post-discontinuation remission.
What is the alternative to weekly allergy shots?
Three approaches change the weekly clinic-frequency requirement. Cluster build-up delivers 2–4 injections per visit at ≥30-minute intervals, reaching maintenance in 4–8 weeks instead of 6 months — but each visit takes 2–3 hours and the per-injection reaction risk is more than 3-fold higher than conventional (Tabar 2005 JACI; Bernstein 2008 JACI). Rush build-up compresses to 1–3 days with multiple injections over hours — systemic reaction rate up to >36% vs. <1% conventional (PMID 8977545). Curex's at-home SCIT program keeps the same weekly shot but removes the clinic trip: for eligible patients the serum is sterile-compounded to USP <797> standards, a prescribed epinephrine auto-injector is confirmed on hand, and the first dose plus every dose change is supervised live over Zoom, with gradual week-by-week escalation matching the clinic protocol.
What happens if I miss a weekly allergy shot?
Missing a weekly build-up appointment triggers a dose-reduction protocol per Cox 2011 PP3 interval-based dose-adjustment tables. Build-up intervals are commonly 3–10 days. Exceeding approximately 10–14 days typically triggers a dose reduction — the prior lower dose is repeated before resuming escalation. A longer gap requires a proportionally larger reduction. Patients should notify their allergist before any known gap so that a reduced-dose vial can be prepared. Consistent weekly attendance during build-up is important because dose reductions extend the build-up timeline and may reduce the patient's ultimate tolerance level if escalation is repeatedly interrupted.
Why do so many patients drop out during weekly allergy shots?
Real-world data from Tkacz JP et al., Curr Med Res Opin 2021;37(6):957–965 (DOI 10.1080/03007995.2021.1903848) found 23.9% of 103,207 AIT patients never returned after the first injection and only 43.9% reached maintenance. The weekly clinic-visit requirement — 24–28 separate appointments each with a 30-minute wait — is the primary structural barrier. Geographic access adds to the burden: Wu I et al. (AAAAI 2019) found 81.5% of US counties have zero allergists. Patients with inflexible work schedules, childcare responsibilities, or limited transportation are most vulnerable to dropout during the weekly build-up phase. Discussing alternatives before starting — not after dropping out — improves outcomes.
Can I get allergy shots once a month from the start?
No — starting at a monthly frequency is not appropriate for build-up. The dose escalation during build-up requires frequent visits to safely increase the allergen concentration. Per Cox 2011 PP3, build-up intervals are commonly 3–10 days; the escalation protocol is designed for weekly or twice-weekly frequency. Once-monthly injections during build-up would require returning to the same low-dose vial at each visit due to the missed-dose interval-adjustment rules, making it effectively impossible to reach the maintenance dose within a reasonable timeline. Monthly frequency is only appropriate once the maintenance dose has already been established through conventional or accelerated build-up.
Do allergy shots have to be given in a clinic?
Traditionally yes — in-clinic administration with trained staff and epinephrine on hand for a 30-minute observation was the standard, and the safety baseline of one fatality per 23.3 million injection visits (Epstein 2013) was established under in-office conditions. That in-office requirement reflected the small risk of a systemic reaction, not the chemistry of the serum. For eligible maintenance patients, a personalized serum sterile-compounded to USP <797> standards, a prescribed epinephrine auto-injector confirmed on hand, a first dose and every dose change supervised live over Zoom, and gradual week-by-week escalation now make safe at-home self-administration possible — the model Curex uses to deliver the same SCIT immunotherapy at home for $129/month.
Related Articles
Allergy Shots vs. Vaccines: Key Differences | Curex
Allergy shots and vaccines are not the same. WHO 1998 endorsed 'allergen vaccine' terminology, but the immune mechanisms differ fundamentally. Co-administration guidance inside.
Read moreAllergy Shot Maintenance Schedule: Cox 2011 Guide | Curex
Allergy shot maintenance: every 2–4 weeks for 3–5 years at ~0.5 mL. 30-min observation continues. Missed-dose rules, Durham 1999 durability, and 42–130 lifetime visit math.
Read moreAllergy Cluster Shots: Schedule, Risks & Who Qualifies
Allergy cluster shots: 2–4 injections per visit, maintenance in 4–8 weeks. Per-injection reaction rate is 3× conventional. Tabar 2005 shows equal efficacy.
Read moreAllergy Exposure Therapy: Safe vs Unsafe | Curex
Allergy exposure therapy = SCIT or SLIT: controlled escalating allergen doses under allergist care inducing tolerance. Unsupervised exposure is dangerous.
Read moreDesensitization Allergy: SCIT Guide & Mechanism | Curex
Desensitization for allergy means SCIT — a 3-to-5-year dose-escalation course inducing immune tolerance. Cochrane 51 RCTs: SMD -0.73. Distinct from acute drug desensitization.
Read moreAllergy Immunotherapy Guide: All Options Compared | Curex
Allergy immunotherapy covers shots, tablets, drops, and OIT. Compare SCIT vs SLIT on efficacy, safety, cost, and FDA status to choose the right route.
Read moreGet your allergy shots — without the clinic.
Curex's flat $129/month covers end-to-end at-home immunotherapy — a personalized serum compounded to USP <797> sterile standards, board-certified allergist oversight, and one weekly injection you give yourself at home. No clinic visits, no facility fees. HSA/FSA eligible.
$129/mo flat · No facility fees · HSA/FSA eligible · Cancel anytime
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.