Standardized Mite, Dermatophagoides farinae, Scratch or Bulk, 30000 AU per mL

• Standardized Mite Extract (Dermatophagoides farinae), Standardized Mite Extract (Dermatophagoides pteronyssinus), Standardized Mite Mixture Extract (Dermatophagoides farinae and Dermatophagoides pteronyssinus) can cause anaphylaxis, including anaphylactic shock and death.¹ (5.1)
• Do not administer to individuals with:

• severe, unstable or uncontrolled asthma;

• history of severe systemic reaction to the allergen extract when administered for diagnosis or treatment;

• medical conditions that reduce the ability to survive anaphylaxis. (4)

• Observe individuals for at least 30 minutes following administration. Emergency measures and healthcare providers trained in their use must be available in the event of a life-threatening reaction. (5.1)
• Individuals with extreme sensitivity to these products, on an accelerated immunotherapy build-up, switching to another lot, receiving high doses of these products, or exposed to similar allergens may be at increased risk of anaphylaxis. (5.1)
• These products may not be suitable for individuals who may be unresponsive to epinephrine or inhaled bronchodilators, such as those taking beta-blockers. (5.1)

Standardized Mite Extract (Dermatophagoides farinae), and Standardized Mite Extract (Dermatophagoides pteronyssinus) are skin tests indicated for:

• Diagnosis of patients with a clinical history of allergy to dust mite allergens. ^{8, 9, 10, 13}

Standardized Mite Extract (Dermatophagoides farinae), Standardized Mite Extract (Dermatophagoides pteronyssinus), Standardized Mite Mixture Extract (Dermatophagoides farinae and Dermatophagoides pteronyssinus) are immunotherapies indicated for:

• Mitigation of mite-induced allergic asthma, rhinitis and conjunctivitis in patients with hypersensitivity to dust mites based on clinical history and confirmation by skin or in vitro testing for allergen-specific IgE antibodies.^{11, 12}

2.1      Preparation for Administration

Appearance is clear to slightly opalescent.  Standardized mite extracts should be a yellowish to light brown solution.  Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.  Discard solution if either of these conditions exist.

Standardized mite extracts diluted with Albumin Saline with Phenol (0.4 %) (stabilized diluent) may be more potent than standardized mite extracts diluted with diluents that do not contain albumin.  When switching from non-stabilized to stabilized diluent, consider less concentrated initial dilutions for both intradermal testing and immunotherapy.

Different formulations, preparations, or new lots of standardized mite extracts are not interchangeable.  Dosage should be adjusted appropriately when formulations, preparations, or lots of standardized mite extracts are changed [see Immunotherapy ( 2.3 ) and Dosage Forms and Strengths ( 3 )].

Standardized mite extracts may be prepared for intradermal (diagnosis) or subcutaneous (immunotherapy) administration by diluting stock concentrates.

• For diluent, use sterile albumin saline with phenol or sterile normal saline with phenol.
• Dilute stock concentrates by a minimum of 100-fold for intradermal testing.  Dilutions of 1,000-fold or greater are appropriate starting points for patients with a clinical history of adverse reaction.

To prepare dilutions for intradermal testing and immunotherapy, start with a stock concentrate, and prepare a ten-fold (1:10) dilution by adding 0.5 mL of concentrate to 4.5 mL of sterile aqueous diluent.  Prepare subsequent dilutions in a similar manner (see Table 1).

Table 1:  10-fold Dilution Series for Standardized Mite Extracts Labeled 10,000 AU*/mL and 30,000 AU*/mL

* Allergy Units

** Store extract dilutions at 2 °C to 8 °C (36 °F to 46 °F).

2.2      Diagnostic Testing

For percutaneous and intradermal use only.

Use Standardized Mite Extract (Dermatophagoides  farinae) or Standardized Mite Extract (Dermatophagoides pteronyssinus) to identify patients who exhibit an allergic response to either species of dust mite (D. farinae or D. pteronyssinus).  False positive reactions may occur.  A positive skin test reaction must be interpreted in the context of the individual’s clinical history and known exposure to the allergen.

• Administer percutaneous tests prior to administration of intradermal tests.
• Do not use Standardized Mite Mixture Extract (Dermatophagoides  farinae and Dermatophagoides  pteronyssinus) for diagnostic testing because a positive reaction would not permit identification of the specific mite allergen that elicited the reaction.  In addition, a negative reaction would fail to indicate whether an individual component allergen would have elicited a positive reaction at full strength.

Percutaneous Skin Testing

Dose

Unless an individual is suspected to be at greater risk for anaphylaxis, the initial starting dose is 1 drop (approximately 0.05 mL) of concentrated standardized mite extract (30,000 AU/mL).  For individuals suspected to be at greater risk for anaphylaxis (for example, as indicated by a history of allergen-induced anaphylaxis), initiate percutaneous testing with 1 drop of a diluted standardized mite extract, if negative retest with the next higher concentration(s). Doses should be administered 15‑20 minutes apart [see Preparation for Administration ( 2.1 )].

Administration

Place one drop (approximately 0.05 mL) of standardized mite extract on the skin and using a skin test device, such as a sterile needle, lancet, or bifurcated needle, pierce through the drop into the skin with a slight lifting motion.

For self-loading devices refer to the manufacturer’s product instructions.

Include a positive histamine skin test control to identify patients whose recent use of drugs with antihistamine activity may result in a false negative skin test.  [see Drug Interactions ( 7.1)].

Include a negative control to detect false positive responses, which can occur when the patient has a non-specific reaction to the diluent or due to dermographism. A 50% glycerin solution may be used as the negative control.  

Interpreting Results

Measure and record skin test responses 15-20 minutes after exposure.²² Individual patient reactivity can vary with time, allergen potency, and/or immunotherapy, as well as testing technique. The most reliable method of recording a skin test reaction is to measure the largest diameter of both wheal and erythema. While some correlation exists between the size of the skin test reaction and the degree of sensitivity, other factors should be considered in the diagnosis of allergy to specific allergens (see Figure 1).

• The negative control (50 % glycerin solution) response should measure < 3 mm wheal and ≤ 10 mm flare.
• Response to the positive control should be at least 3 millimeters larger than the response to the negative control.
• If either the response to the histamine positive control or to the negative control do not meet the criteria above for acceptable wheal size, the results for the allergenic extracts tested at the same time should be considered invalid and be repeated.

Figure 1:  Measurement of Wheal and Flare

Use a paper or plastic millimeter skin reaction guide as shown below.

Reaction guide #1 Reaction guide #2

Fifteen minutes after application of the skin test, measure the length and midpoint orthogonal width of each flare and wheal from the inner edge of the reaction.

Reaction guide #3The wheal is a smooth, slightly elevated area which is redder or paler than the surrounding skin. The flare is the red outermost zone of the skin test reaction.

The length of the skin test is defined as the largest diameter and the width of the skin test is defined as the diameter perpendicular to the length at its midpoint. Consider the wheal and flare as separate entities. First, measure the flare and then independently measure the wheal.

Measuring the Flare                                                                         Measuring the Wheal

Reaction guide #4 Reaction guide #5

The average diameter measurement in the example above of the flare is (26 mm + 36 mm)/2 = 31 mm and the average diameter of the wheal is (10 mm + 16 mm)/2 = 13 mm.

Intradermal (Intracutaneous) Skin Testing

Always perform percutaneous tests prior to intradermal skin tests.²²

Dose

For patients with negative or equivocal percutaneous testing for whom there is a high index of suspicion of dust mite allergy, intradermal testing may be performed with 0.02 to 0.05 mL of a 30 AU/mL extract solution. [see Preparation for Administration ( 2.1)]. If this test is negative, a second intradermal test may be performed with 0.02 to 0.05 mL of a 300 AU/mL extract solution. 

Administration

Intradermally inject the dose of the diluted allergenic extract using a 1 mL syringe.

Include a positive histamine control at intradermal strength to identify patients whose recent use of drugs with antihistamine activity may result in a false negative skin test. [see Drug Interactions ( 7.1 )].

Include an aqueous buffer negative control (Sterile Albumin Saline with Phenol, Sterile Buffered Saline with Phenol) to detect false positive responses, which can occur when the patient has a non-specific reaction to the diluent or due to dermographism.

Interpreting Results

Measure wheal responses for the histamine positive control test and allergen tests at 15‑20 minutes after injection. Refer to Figure 1 for the measurement of wheal and flare.

• Response to the positive control should be at least 3 millimeters larger than the response to the negative control.
• The negative control (sterile aqueous diluent) response should measure < 3 mm wheal and ≤ 10 mm flare (erythema).

• If either the response to the histamine positive control or to the negative control do not meet the criteria above for acceptable wheal size, the results for the allergenic extracts tested at the same time should be considered invalid and be repeated.

2.3      Immunotherapy

For subcutaneous use only.

Subcutaneous injections for immunotherapy should be prepared by dilution of stock concentrate. See Table 1 for dilution preparation.

Administration

Administer immunotherapy by subcutaneous injection in the lateral aspect of the arm or thigh.  Do not inject directly into any blood vessels.

Most adverse reactions occur within 30 minutes after injection.  Therefore, observe patients for at least 30 minutes.²³

Dose Build-up

Dosing of standardized mite extracts for allergen immunotherapy is highly individualized. The initial dose should be based on the patient’s percutaneous skin test reactivity and clinical history. The initial dose is typically 0.05 mL of a 0.01 to 0.03 AU/mL dilution. In patients who appear to be exquisitely sensitive by skin test and history, consider a lower initial dose such as 0.05 mL of a 0.001 to 0.003 AU/mL dilution. The dose is increased at each injection by no more than 50% of the previous dose, and the next increment is governed by the response to the last injection. Dosing is increased in increments until 0.5 mL is reached, following which 0.05 mL is administered from the next most concentrated allergen extract or allergen mixture vial in the dilution series.  Injections are typically given one or two times per week until the maintenance dose is reached.

• Any evidence of a systemic reaction to immunotherapy is an indication for a significant reduction (at least 75%) in the subsequent dose or the cessation of immunotherapy. Proceed cautiously in subsequent dosing if immunotherapy is continued.
• Repeated systemic reactions, even of a mild nature, are sufficient reason for the cessation of further attempts to increase the reaction-causing dose.
• The volume of solution for immunotherapy may produce increased discomfort in pediatric individuals.  In order to achieve the total dose required, the volume of the dose may be divided into more than one injection per visit.

  Maintenance Dose Selection and Intervals

  Select a maintenance dose based on the patient's clinical response and tolerance.

• Typical maintenance dose is 500-2,000 AU.²³ Occasionally, higher doses are necessary to relieve symptoms.
• The two mite species are highly cross-reactive. Therefore, consider the total Allergy Units when determining the target maintenance dose.
• Maintenance doses larger than 0.2 mL of undiluted allergen extract are rarely administered because an extract in 50% glycerin may cause patient discomfort upon injection.
• After the maintenance dose is achieved, increase the injection interval to 2 weeks, then 3 weeks, and finally 4 weeks as tolerated. The optimal interval between maintenance doses of allergenic extract varies among individuals. Administer the maintenance dose at a given interval three or four times before further increasing the interval to ensure that no reactions occur. Protection may be lost rapidly if the interval between doses is more than 4 weeks.

  Dosage Modification for Immunotherapy

  Withhold immunotherapy and/or reduce dosage, if any of the following conditions exist:

• Severe symptoms of rhinitis and/or asthma. 
• Infection accompanied by fever.

Any evidence of a systemic reaction is an indication for a significant reduction (at least 75%) in the subsequent dose. Repeated systemic adverse reactions are sufficient reason for the cessation of further attempts to increase the dose.

In situations prompting dose reduction, a cautious increase in dose can be attempted once the reduced dose is tolerated. The dose should be reduced to the last level not causing the reaction and maintained at this level for two or three treatments before cautiously increasing again.

Prolonged period has elapsed since the last injection:  Patients may lose tolerance for allergen injections during prolonged intervals (> 4 weeks) between doses.  The duration of tolerance is an individual characteristic and varies from patient to patient.  In general, the longer the lapse in the injection schedule, the greater dose reduction required.

Changing to a different lot of standardized extract:  All extracts can lose allergenic activity over time and extracts vary in allergenic activity.  Two different lots of extract could differ substantially in allergenic activity, even if they are the same formula and concentration.  The volume of the first dose from the new vial should not exceed 50% of the previous dose.  Do not use extracts beyond their expiry date.

Changing to an extract from a different manufacturer:Since manufacturing processes and sources of raw materials differ among manufacturers, the interchangeability of extracts from different manufacturers cannot be assured. Decrease the starting dose of the new extract when the extract is the same formula and dilution as the one previously used.  In general, a volume dose reduction to 50% of the previous product dose is adequate, but each situation must be evaluated separately considering the patient's history of sensitivity, tolerance of previous injections, and other factors.  If the patient tolerates the 50% decrease, then raise the next dose to the previous tolerated dose amount.  To re‑establish the maintenance dose the starting interval between doses should not be greater than one week.

Changes made in the extract concentrate formula: Changes other than those listed above such as a difference in extracting fluid (e.g., change from non-glycerin extracts to 50% glycerin extracts), combining two or more stock concentrates, or any other change can affect a patient’s tolerance of the treatment. Extra dilutions are recommended whenever starting a revised formula. The greater the change, the greater the number of dilutions required.²³ 

Duration of Treatment

The duration of treatment for immunotherapy has not been established.  A period of three to five years of injection therapy constitutes an average minimum course of treatment.  Evaluate patients for treatment response at least every 6 to 12 months while they receive immunotherapy.  The decision to continue or stop immunotherapy must be individualized.²³

Injection. Standardized mite extracts are labeled in Allergenic Units per milliliter (AU/mL) [see Description (11)].  Refer to the vial label for the product concentration [see How Supplied/Storage and Handling (16)].

• For percutaneous testing, standardized mite extract stock concentrates containing 30,000 AU/mL of D. farinae or D. pteronyssinus are supplied in 5 mL dropper vials [see Description (11)].
• For intradermal testing, standardized mite extract stock concentrates containing 30,000 AU/mL of D. farinae or D. pteronyssinus are supplied in 10 mL and 30 mL multidose vials [see Description (11)].
• For immunotherapy, standardized mite extract stock concentrates containing a total of 10,000 or 30,000 AU/mL of D. farinae or D. pteronyssinus or 5,000 or 15,000 AU/mL of an equal mixture of D. farinae and D. pteronyssinus are supplied in 10, 30, and 50 mL multiple-dose vials [see Description (11)].

Standardized mite extracts are contraindicated in individuals with the following conditions:

• Severe, unstable or uncontrolled asthma.
• History of any severe systemic reaction to the allergen extract when administered for diagnosis or treatment.
• Medical conditions that reduce the ability to survive anaphylaxis.

5.1   Anaphylaxis

Anaphylaxis, which may lead to death, can occur in individuals following the administration of standardized mite extracts, particularly in the following situations [see Adverse Reactions ( 6 )]: ^{18, 19, 20, 21}

• Extreme sensitivity to the standardized mite extracts.
• Receipt of an accelerated build-up schedule.
• Change from one lot of a particular standardized mite extract to another lot of the same standardized mite extract.
• Receipt of high doses of the standardized mite extracts.
• Exposure to excessive amounts of dust mite.

Standardized mite extracts may not be suitable for individuals who may be unresponsive to epinephrine or inhaled bronchodilators, such as those taking beta‑blockers.

Medications to treat systemic reactions, as well as emergency equipment should be available for immediate use. Administer standardized mite extracts in a healthcare setting under the supervision of a healthcare provider prepared to manage anaphylaxis.    Individuals should remain in the provider’s office for a minimum of 30 minutes after receiving an injection of standardized mite extracts, so that any adverse reaction can be observed and appropriately managed.

Common adverse reactions reported for standardized mite extracts are:

• Local reactions occurred in 26 to 82 % of all patients who received subcutaneous allergen immunotherapy, at the injection site (e.g., erythema, swelling, pruritus, tenderness and pain).²³
• Systemic adverse reactions, occurred in ≤ 7 % of patients who received subcutaneous allergen immunotherapy (e.g., generalized skin erythema, urticaria, pruritus, angioedema, rhinitis, wheezing, laryngeal edema, hypotension, and shock).²⁴ Systemic reactions may be fatal.^{1 , 23}

No clinical trials of standardized mite extracts have been conducted.

Published studies of allergenic extracts report systemic reactions occurring in fewer than 1 % in patients receiving conventional immunotherapy and greater than 36 % in patients receiving rush immunotherapy.^{1 , 14, 26, 27} Most systemic reactions occurred within 30 minutes of injection.  However, systemic reactions have been reported to occur up to 2 hours after the final injection with rush schedules.  Some reactions have occurred up to 6 hours after skin tests or immunotherapy.^{23, 24, 28}

7.1   Antihistamines

Do not perform skin testing with standardized mite extracts within 3 to 10 days of first-generation H1‑histamine receptor blockers (e.g., clemastine, diphenhydramine) and second-generation antihistamines (e.g., loratadine, fexofenadine) being used.  These products suppress histamine skin test reactions and could mask a positive response.^{2 , 22, 23}

7.2   Topical Corticosteroids and Topical Anesthetics

Topical corticosteroids may suppress skin reactivity; therefore, discontinue use at the skin test site for at least 2 to 3 weeks before skin testing.^{2 , 3}  Avoid use of topical local anesthetics at skin test sites because they can suppress flare responses.^{4 , 22, 23}

7.3   Tricyclic Antidepressants

Tricyclic antidepressants, such as doxepin, can have potent antihistamine effects and may alter skin test results.  Allow 7 to 14 days after discontinuation of tricyclic medication prior to skin testing.^{17, 22, 23}

See 17 for PATIENT COUNSELING INFORMATION.

Standardized mite extracts are injections for percutaneous, intradermal, or subcutaneous use labeled in Allergy Units per milliliter (AU/mL).⁵  Standardized Mite Extract (Dermatophagoides  farinae), Standardized Mite Extract (Dermatophagoides  pteronyssinus), and Standardized Mite Mixture Extract (Dermatophagoides  farinae and Dermatophagoides  pteronyssinus) are sterile solutions containing the extractables of D. farinae and/or D. pteronyssinus, 0.5 % sodium chloride, 0.275 % sodium bicarbonate, and 50 % glycerin by volume as a preservative.  Source material for the extracts is the whole bodies of the mites.  The mites are each grown on a medium of brine shrimp eggs and wheat germ, and are handled and cleaned in a manner such that the maximum carryover of the medium components is less than 1%.  The medium contains no material of human origin.

Standardized Mite Extract (Dermatophagoides  farinae) and Standardized Mite Extract (Dermatophagoides  pteronyssinus) concentrates (stock concentrates) containing 30,000 AU/mL are supplied in dropper vials for percutaneous testing.  Stock concentrates are also available in multiple-dose vials containing 10,000 AU/mL and 30,000 AU/mL to be diluted for intradermal testing and immunotherapy.

Standardized Mite Mixture Extract (Dermatophagoides  farinae and Dermatophagoides  pteronyssinus), is a mixture of the two mite species, in equal parts, resulting in D. pteronyssinus at 15,000 AU/mL and D. farinae at 15,000 AU/mL is available for therapeutic use.  A mixture of the two species is also available at 5,000 AU/mL each species.

The potency of each lot of standardized mite extract is determined by comparison to the US reference preparation (10,000 AU/mL) provided by the Center for Biologics Evaluation and Research of the FDA. The relative potency of each extract is determined by ELISA inhibition and labeled in AU/mL.

Clinical studies that address the efficacy of immunotherapy are available.^{6, 7} Specific immunotherapy with allergenic extracts is helpful in reducing symptoms associated with exposure to the offending allergens.  A summary of effectiveness by the Panel on Review of Allergenic Extracts, an advisory committee to the U.S. Food and Drug Administration, has been published.²⁵

1. Lockey, Richard F., Linda M. Benedict, Paul C. Turkeltaub, Samuel C. Bukantz. Fatalities from immunotherapy (IT) and skin testing (ST). J. Allergy Clin. Immunol., 79 (4): 660-677, 1987.
2. Pipkorn, Ulf. Pharmacological influence of anti-allergic medication on In Vivo allergen testing. Allergy. 43: 81-86, 1988
3. Andersson, M. and U. Pipkorn. Inhibition of the dermal immediate allergic reaction through prolonged treatment with topical glucocorticosteroids. J. Allergy Clin. Immunol. 79 (2): 345-349, February 1987.
4. Pipkorn, Ulf, and M. Andersson. Topical dermal anesthesia inhibits the flare but not the wheal response to allergen and histamine in the skin prick test. Clinical Allergy. 17: 307-311, 1987.
5. Turkeltaub, Paul C., MD, and Suresh C. Rastogi, PhD. Quantitative intradermal test procedure for evaluation of subject sensitivity to standardized allergenic extracts and for assignment of allergy units to reference preparations using the ID50EAL method, Allergenics Products Testing Laboratory, Center for Biologics Evaluation and Research (CBER), FDA. Revised: November 1994.
6. Smith. A.P. Hyposensitization with Dermatophagoides pteronyssinus antigen: Trial in asthma induced by house dust. Br. Med. J., 4: 204-206, 1971.
7. Chapman, M.D., T.A.E. Platts-Mills, M. Gabriel, H.K. Ng, W.G.L. Allen, L.E. Hill, A.J. Nunn. Antibody response following prolonged hyposensitization with Dermatophagoides pteronyssinus extract. Int. Arch. Allergy Appl. Immunol., 61: 431-440, 1980.
8. Sheldon, J.M., R.G. Lovell, K.P. Matthews. A Manual of Clinical Allergy. Second Edition. W.B. Saunders, Philadelphia, 1967, pp. 107-112.
9. Sherman, W.B. Hypersensitivity Mechanism and Management. W.B. Sanders, Philadelphia, 1968, pp. 169-172.
10. Swineford, O. Asthma and Hay Fever. Charles C. Thomas, Springfield, IL, 1971, pp. 148-155.
11. Pauli, G., J.C. Bessot, R. Thierry, and A. Lamensons. Correlation between skin tests, inhalation tests and specific IgE in a study of 120 subjects to house dust and D. pteronyssinus. Clin. Allergy, 7:337, 1977.
12. Murray, A.B., A.C. Ferguson and B.J. Morrison. Diagnosis of house dust mite allergy in asthmatic children: what constitutes positive history? J. Allergy Clin. Immunol. 71:21, 1983.
13. Patterson, Roy, et al. Allergy Principles and Practice, 2nd ed. E. Middleton, Jr., C.E. Reed, E.F. Ellis, Ed., C.V. Mosby Co., 1983, St. Louis, MO, 1983, Chapter 52.
14. Turkeltaub, Paul C., MD, and Peter J. Gergen, MD. The risk of adverse reactions from percutaneous prick-puncture allergen skin testing, venipuncture, and body measurements: data from the second National Health and Nutrition Examination Survey, 1976-80 (NHANES II). J. Allergy Clin. Immunol. 84(6): 886-890, Dec. 1989.
15. Peebles, Ray Stokes, Jr., B. Bochner, Howard J. Zeitz, ed. Anaphylaxis in the elderly. Immunology and Allergy Clinics of North America. 13 (3): 627-646, August 1993.
16. Metzger, W.J., E. Turner and R. Patterson. The study of immunotherapy during pregnancy. J. Allergy Clin. Immunol. 61 (4): 268-272, 1978.
17. Rao, Kamineni S., et al. Duration of suppressive effect of tricyclic anti-depressants on histamine induced wheal and flare reactions on human skin. J. Allergy Clin. Immunol. 82: 752-757, November 1988.
18. Reid, M.J., R.F. Lockey, P.C. Turkletaub, T.A.E. Platts-Mills. Survey of fatalities from skin testing and immunotherapy. J. Allergy Clin. Immunol. 92 (1): 6-15, July 1993.
19. Reid, M.J., G. Gurka. Deaths associated with skin testing and immunotherapy. J. Allergy Clin. Immunol. 97 (1) Part 3:231, Abstract 195, January 1996.
20. Thompson, R.A. et al, report of a WHO/IUIS working group. The current status of allergen immunotherapy (hyposensitization). Allergy. 44: 369-379, 1989.
21. Malling, H.-J., B. Weeke, et al, The European Academy of Allergology and Clinical Immunology. Position Papers Allergy. 48 (Supplement 14): 9-82, 1993.
22. Bernstein IL, Li JT, Bernstein Dl, et al.  Allergy diagnostic testing:  an updated practice parameter.  Ann Allergy Asthma Immunol.  2008 Mar;100:S1-148.
23. Cox L, Nelson H, Lockey R, Calabria C, Chacko T, Finegold I, et al.  Allergen immunotherapy:  A practice parameter third update.  J Allergy Clin Immunol.  2011 Jan;127:S1-55.
24. Greineder DK. Risk management in allergen immunotherapy.  J Allergy Clin Immunol.  1996 Dec;98(6 Pt 3):S3304
25. Federal Register Proposed Rule:  Biological Products:  Implementation of Efficacy Review, Allergenic Extracts, Federal Register 1985;50:3082-3288.
26. Lockey RF, Nicoara-Kasti GL, Theodoropoulos DS, Bukantz SC. Systemic reactions and fatalities associated with allergen immunotherapy. Ann Allergy Asthma Immunol 2001;87(suppl 1):47-55.
27. Malling HJ. Minimising the risks of allergen-specific injection immunotherapy. Drug Saf 2000;23:323-332.
28. Greenberg MA, Kaufman CR, Gonzalez GE, et. al. Late and immediate systemic-allergic reactions to inhalant allergen    immunotherapy. J Allergy Clin Immunol 1986; 77:865-870.

16.1    How Supplied

Standardized mite extracts are supplied as 50 % glycerin stock concentrates labeled in Allergenic Units per Milliliter (AU/mL) and provided in 10 milliliter, 30 milliliter and 50 milliliter vials for use in percutaneous and intradermal skin testing and subcutaneous immunotherapy.  These extracts may also be supplied in 5 milliliter dropper vials for percutaneous testing only.  These products are supplied as listed in Table 2.

Table 2:  Available Products

16.2    Storage and Handling

Store extracts at 2 °C to 8 °C (36 °F to 46 °F).

Instruct patients to remain in the office under observation for a minimum of 30 minutes after an injection or longer, if deemed necessary for the individual.

Inform patients that reactions may occur more than 30 minutes after skin testing or an injection.

Instruct patients to recognize the following symptoms as systemic adverse reactions and seek emergency medical care right away if any of these occur:

• Unusual swelling and/or tenderness at the injection site.
• Hives or itching of the skin.
• Swelling of face and/or mouth.
• Sneezing, coughing, or wheezing.
• Shortness of breath.
• Nausea.
• Dizziness or faintness.

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 Manufacturer:

Jubilant HollisterStier LLC

Spokane, WA 99207 U.S.A.

U.S. Lic. No. 1272

Version Date: 08/2024

345014-H08