Anaphylactoid reaction

Jump to navigation Jump to search

WikiDoc Resources for Anaphylactoid reaction

Articles

Most recent articles on Anaphylactoid reaction

Most cited articles on Anaphylactoid reaction

Review articles on Anaphylactoid reaction

Articles on Anaphylactoid reaction in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Anaphylactoid reaction

Images of Anaphylactoid reaction

Photos of Anaphylactoid reaction

Podcasts & MP3s on Anaphylactoid reaction

Videos on Anaphylactoid reaction

Evidence Based Medicine

Cochrane Collaboration on Anaphylactoid reaction

Bandolier on Anaphylactoid reaction

TRIP on Anaphylactoid reaction

Clinical Trials

Ongoing Trials on Anaphylactoid reaction at Clinical Trials.gov

Trial results on Anaphylactoid reaction

Clinical Trials on Anaphylactoid reaction at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Anaphylactoid reaction

NICE Guidance on Anaphylactoid reaction

NHS PRODIGY Guidance

FDA on Anaphylactoid reaction

CDC on Anaphylactoid reaction

Books

Books on Anaphylactoid reaction

News

Anaphylactoid reaction in the news

Be alerted to news on Anaphylactoid reaction

News trends on Anaphylactoid reaction

Commentary

Blogs on Anaphylactoid reaction

Definitions

Definitions of Anaphylactoid reaction

Patient Resources / Community

Patient resources on Anaphylactoid reaction

Discussion groups on Anaphylactoid reaction

Patient Handouts on Anaphylactoid reaction

Directions to Hospitals Treating Anaphylactoid reaction

Risk calculators and risk factors for Anaphylactoid reaction

Healthcare Provider Resources

Symptoms of Anaphylactoid reaction

Causes & Risk Factors for Anaphylactoid reaction

Diagnostic studies for Anaphylactoid reaction

Treatment of Anaphylactoid reaction

Continuing Medical Education (CME)

CME Programs on Anaphylactoid reaction

International

Anaphylactoid reaction en Espanol

Anaphylactoid reaction en Francais

Business

Anaphylactoid reaction in the Marketplace

Patents on Anaphylactoid reaction

Experimental / Informatics

List of terms related to Anaphylactoid reaction

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Vidit Bhargava, M.B.B.S [2]

Overview

Anaphylactoid reaction or pseudo allergic reaction is defined as a condition presenting with symptoms similar to an allergic reaction but without detectable immunological sensitization, as found in classical allergic reactions. It is characterized by elevated IgE levels in the blood.

Pathophysiology

The pathophysiological mechanism behind anaphylactoid reactions is not clear. One of them is direct histamine release and release of other mediators caused by some drugs such as such as opioids, intravenous narcotics, colloid volume substitutes on gelatin basis, radiographic contrast media, and others. [1] [2] [3] [4] [5] Direct activation of complement system and kinin-kallikrenin system may also play a role in the development of these reactions. [6] Local anesthetics or stress can induce neuropsychogenic reflexes in the body leading to release of mediators. Involvement of mast cells and basophils has also been found to play a role in the pathogenesis of anaphylactoid reaction.[7]

Causes

Several factors/substances have shown to be associated with anaphylactoid reactions. Shown below is a list of common precipitators of anaphylactoid reactions: [8] [9]

  • Drugs (almost any drug can cause anaphylactoid reaction)
  • Foods (foodstuffs such as peanuts, fish, gelatin etc)
  • Additives in drugs and foods
  • Occupational substances (e.g., latex)
  • Animal venoms (scorpion, snake etc)
  • Aeroallergens
  • Hemodialysis/Contrast induced
  • Seminal fluid
  • Contact urticariogens
  • Physical agents (cold, heat, UV irradiation)
  • Cl-inactivator deficiency
  • Systemic mastocytosis
  • Exercise
  • Echinococcal cyst
  • Idiopathic (?)

Differentiating Anaphylactoid Reaction From Other Diseases

The presentation can be often mimicked by a number of possibilities, although in most cases the signs & symptoms are sufficient to make the diagnosis of anaphylactoid reaction. These mimickers can include:

  • Vasovagal reaction
  • Syncope
  • Drug reactions
  • Hypoglycemia
  • Seizure
  • Foreign body/aspiration
  • Psychogenic
  • Pulmonary embolism/ hyperventilation

Diagnosis

Symptoms

The clinical features are quite similar to anaphylaxis, however the presentation is almost always milder. Most commonly the syndrome begins with involvement of the skin, usually as pruritus, flush, urticaria or angioedema. Paresthesia's, itching of pharynx and genital area, and feeling of anxiety are common symptoms. Almost all organ systems may be involved as explained below:

Respiratory

  • Sneezing or rhinorrhea is the earliest manifestation.
  • Hoarseness or throat tightness
  • Cough and wheezing
  • Change of voice (dysphonia)
  • Dyspnea due to laryngeal obstruction
  • Cyanosis or even respiratory arrest may occur

Gastrointestinal

  • Nausea and cramping
  • vomiting and diarrhea
  • Micturition and defecation


Cardiovascular

  • Tachycardia
  • Hypotension
  • Arrythmia
  • Shock
  • Cardiac arrest

The following system of grading is sometimes used to grade the severity of reactions:

Symptoms


Skin


Abdomen Respiratory


Cardiovascular


Grade I Pruritus, flush, urticaria, angioedema - - -
Grade II Pruritus, flush, urticaria, angioedema Nausea, cramping Rhinorrhea, hoarseness, dyspnea Tachycardia, arrhythmia
Grade III Pruritus, flush, urticaria, angioedema Vomiting, defecation, diarrhea Laryngeal edema, bronchospasm, cyanosis Shock
Grade IV Pruritus, flush, urticaria, angioedema Vomiting, defecation, diarrhea Respiratoy arrest Cardiac arrest

Adapted from Ring and Mesmer

Physical Examination

Medical Therapy

Click here to be redirected to the treatment page.

Prophylaxis

The best way of preventing a reaction is by avoiding the allergen, but this is possible only when allergy diagnosis has been done and patient is informed about the condition and also specific agents involved. It has been found by repeated experiences that drugs are more anaphylactoid when injected as compared to oral administration, so when administering a new drug it's better to do prophetic testing (testing for allergy in the absence of a prior history). Trying first with oral administration or small injectable test doses are other strategies. In some cases, desensitizing a patient to a particular drug is also helpful (Case of Penicillin use for treating syphilis).[10] The induction of immuno-logical tolerance against the xenogeneic protein has been shown to reduce the frequency of side reactions of antilymphocyte globulin therapy.[11] Pseudo allergic reactions can be prevented by H1 and H2 anti histaminics, and includes but is not limited to pseudo allergic reactions caused by IV contrast media, analgesics etc. [1] [2] [3]

References

  1. 1.0 1.1 Doenicke, A.; Ennis, M.; Lorenz, W. (1985). "Histamine release in anesthesia and surgery: a systematic approach to risk in the perioperative period". Int Anesthesiol Clin. 23 (3): 41–66. PMID 2411666.
  2. 2.0 2.1 Levi, R. (1972). "Effects of exogenous and immunologically released histamine on the isolated heart: a quantitative comparison". J Pharmacol Exp Ther. 182 (2): 227–38. PMID 4114900. Unknown parameter |month= ignored (help)
  3. 3.0 3.1 Lorenz, W.; Doenicke, A.; Dittmann, I.; Hug, P.; Schwarz, B. (1977). "[Anaphylactoid reactions following administration of plasma substitutes in man. Prevention of this side-effect of haemaccel by premedication with H1- and H2-receptor antagonists (author's transl)]". Anaesthesist. 26 (12): 644–8. PMID 23706. Unknown parameter |month= ignored (help)
  4. Gehrhardt, B. (1991). "[Dental assistant. Situation of dental assistant in France]". Quintessenz J. 21 (9): 807–9. PMID 1819105. Unknown parameter |month= ignored (help)
  5. "Management of anaphylactic and anaphylactoid reactions during anesthesia - Springer". Retrieved 14 January 2014.
  6. Caine, M. (1986). "Clinical experience with alpha-adrenoceptor antagonists in benign prostatic hypertrophy". Fed Proc. 45 (11): 2604–8. PMID 2428670. Unknown parameter |month= ignored (help)
  7. Hu, J.; Hou, Y.; Zhang, Q.; Lei, H.; Wang, Y.; Wang, D. (2011). "[Real-time detection of mast cell degranulation in anaphylactoid reaction]". Zhongguo Zhong Yao Za Zhi. 36 (14): 1860–4. PMID 22016948. Unknown parameter |month= ignored (help)
  8. Davila, D. "[Therapeutic systems and drug delivery. 4. The osmotic minipump]". Lijec Vjesn. 114 (1–4): 62–7. PMID 1343031.
  9. Sheffer, AL.; Austen, KF. (1980). "Exercise-induced anaphylaxis". J Allergy Clin Immunol. 66 (2): 106–11. PMID 7400473. Unknown parameter |month= ignored (help)
  10. Sullivan, TJ. (1982). "Antigen-specific desensitization of patients allergic to penicillin". J Allergy Clin Immunol. 69 (6): 500–8. PMID 6176609. Unknown parameter |month= ignored (help)
  11. Ring, J.; Seifert, J.; Lob, G.; Coulin, K.; Angstwurm, H.; Frick, E.; Brass, B.; Mertin, J.; Backmund, H. (1974). "Intensive immunosuppression in the treatment of multiple sclerosis". Lancet. 2 (7889): 1093–6. PMID 4139403. Unknown parameter |month= ignored (help)