At-home allergy shot protocols explained

Home administration is for preselected, lower-risk patients. The practice parameter identifies poorly controlled asthma as a key risk factor for severe reactions and advises against injecting when asthma is not controlled; pregnancy is a reason not to start immunotherapy; beta-blockers can make a reaction harder to treat.

Keep these patients in the office, or out of SCIT until reassessed:

The first injection—or the first several, as the prescriber decides—is given in the practice under physician supervision, with the standard 30-minute observation after each injection. This confirms the patient tolerates the starting vial before any dose is given at home.

Those visits double as training. The patient and another adult who will be present at home learn injection technique, how to read the vial label and dosing log, how to recognize early signs of a systemic reaction and how to use epinephrine. The practice parameter calls for informed consent and a trained second adult whenever home administration is used.

Before the first home dose, confirm the patient has the correct vials, a dosing log, an unexpired epinephrine auto-injector and the practice’s after-hours number.

Every home-SCIT patient needs a prescribed epinephrine auto-injector on hand for each injection and a written action plan that says what to do, in what order. Systemic reactions are uncommon but can occur with any allergy shot, and delayed or biphasic reactions can begin after the observation window.

The plan should tell the patient to use epinephrine and call 911 for breathing difficulty, throat tightness, widespread hives with other symptoms, faintness or a sense of impending doom; to hold the dose and call the practice when ill, wheezing or after a missed interval; and to report every reaction so the prescriber can decide whether to adjust or move care back to the office.

The AAAAI/ACAAI allergen immunotherapy practice parameter states that allergy injections should be given in a medical facility with trained staff and equipment to recognize and treat anaphylaxis. It allows home administration in rare, exceptional circumstances, decided case by case with informed consent and a trained adult present, and says frequent or routine prescription of home immunotherapy is not appropriate. Practices that offer home SCIT should know this position and document how each patient’s plan addresses it.

The largest published safety review of a home protocol (Schaffer et al., International Forum of Allergy & Rhinology, 2015) analyzed one year of records from 23,614 patients who self-administered 2,021,600 injections using a preselection-plus-slow-build-up protocol. It recorded 37 systemic reactions—0.16% of patients and 0.002% of injections—and no deaths. Among 4,643 children, 9 had a systemic reaction (0.19%); among 18,971 adults, 28 (0.15%). The authors attribute these results to excluding high-risk patients and a slow build-up phase. It is a retrospective review of a selected, lower-risk population, which is exactly why patient selection is not optional.

Each vial is labeled for one patient with the vial number, fractional dilution, beyond-use date and storage conditions—the labeling USP <797> requires for allergenic extract prescription sets. A consistent number or color system across the set helps patients and staff give the right vial; follow the label, not the color alone.

SCIT vials are refrigerated. Store them in a medication refrigerator at 2–8 °C (36–46 °F), never frozen and never in the door. AlleReach recommends refrigerating on receipt unless you will dilute immediately, and keeping diluted vials refrigerated whenever they are not in use. A practice that dilutes a concentrate should do so as soon as possible after receipt; if that will take longer than three days, call AlleReach for updated vial and box labels with the correct expiration dates.

AlleReach ships by overnight courier. Vials do not need to be cold to the touch on arrival: allergen extracts tolerate ambient shipping, and only temperature extremes over a prolonged period degrade potency. If a shipment was badly delayed or exposed to extreme heat, call the pharmacy for a potency assessment before use. Summer ice packs are available on request.

Allergy drops are a different product with different storage. This guide covers injection vials only.

Plan the reorder around the patient’s dosing log so the next vial arrives before the current one runs out or reaches its beyond-use date. Established practices reorder through the AlleReach refill portal or by phone; new prescriptions start by phone.

Missed doses and gaps are clinical decisions. Patients follow the adjustment instructions in their dosing log and call the practice; the prescriber decides whether to repeat, reduce or return to an earlier vial. If a lapse affects which vial the patient should receive next, AlleReach Customer Support (1.844.REACHRX) will work through the timing with you.