Continuing Education Activity
Rhinitis medicamentosa (RM), also known as; rebound congestion is inflammation of the nasal mucosa caused by the overuse of topical nasal decongestants. It classifies as a subset of drug-induced rhinitis. Topical decongestants are typically used in the relief of nasal congestion due to allergic rhinitis, acute or chronic rhinosinusitis, nasal polyps, or upper respiratory tract infection. This activity reviews the cause and pathophysiology of rhinitis medicamentosa and highlights the role of the interprofessional team in its management.
Objectives:
Identify the etiology rhinitis medicamentosa.
Review the presentation of a patient with rhinitis medicamentosa.
Outline the treatment and management options available for rhinitis medicamentosa.
Describe interprofessional team strategies for improving care and outcomes in patients with rhinitis medicamentosa.
Introduction
Rhinitis medicamentosa (RM), also known as ‘rebound congestion’ is inflammation of the nasal mucosa caused by the overuse of topical nasal decongestants. It classifies as a subset of drug-induced rhinitis.
Topical decongestants are typically used in the relief of nasal congestion due to allergic rhinitis, acute or chronic rhinosinusitis, nasal polyps, or upper respiratory tract infection. The earliest nasal decongestants mainly derived from ephedrine, where there were reports of rebound congestion after prolonged use. This situation was found to develop as early as 3 days and up to 4 to 6 weeks of use.[1] However, with the emergence of modern vasoconstrictors, such as the imidazoline derivatives, the risk of developing RM is considered to be small or non-existent.
Etiology
The cause of this condition is primarily by the prolonged use (more than 7 to 10 days) of topical nasal decongestant. However, intranasal cocaine use has also been reported to cause a similar condition.
Physiology of Nasal Congestion
The nasal mucosa vascular system can divide into resistance vessels (arterioles) which are predominantly regulated by alpha-2 adrenoreceptors, and capacitance vessels (venous plexus) regulated by both alpha-1 and alpha-2 adrenoreceptors.Stimulation of these receptors leads to thedecongestants effect; where there is vasoconstriction of the large venous sinusoids and collecting veins, leading to decreased blood flow and subsequently decreased nasal edema and rhinorrhoea.
Contributing factors of nasal congestion include parasympathetic nervous system stimulation, the release of local mediators including mast cells, eosinophils, basophils; which subsequently stimulates the release of histamine, tryptase, kinins, prostaglandins, and leukotrienes, inducing an overall change in nasal resistance and capacitance vessels.[2]There isexudation of plasma through superficial capillaries, and increase mucin production by goblet cells.
Topical Nasal Decongestants
Topical nasal decongestants can classify as either beta-phenylethylamine derivatives or imidazoline derivatives. Beta-phenylethylamine derivatives mimic the effects of the sympathetic nervous system stimulation by producing vasoconstriction via the activation of alpha-1 adrenoreceptors. Rebound vasodilation may occur due to weak affinity towards beta–adrenoreceptors. Imidazolines, on the other hand, produces its effect mainly via alpha-2 adrenoreceptors. This difference in adrenoreceptor sensitivity makes the imidazoline agents more effective at decreasing mucosal blood flow due to its vasoconstrictive effect to both capacitance and resistance vessels in the nasal mucosa.
Comparatively, imidazole group demonstrates a more potent and longer-acting effect. For example, 0.1% xylometazoline hydrochloride works within a few minutes and lasts up to 10 hours, while 1% phenylephrine works within 15 to 20 minutes with effects lasting 2 to 4 hours.
Types of intranasaldecongestant (adrenoreceptor activity)
Beta-phenylethylamine derivatives
Ephedrine HCl (alpha-1, alpha-2, beta-1, beta-2)
Phenylephrine HCl(alpha-1)
Imidazoline derivatives (primarily alpha-2 agonists)
Naphazoline HCl
Oxymetazoline HCl
Xylometazoline HCl
Benzalkonium chloride (BKC)
A common antimicrobial preservative benzalkonium chloride (BKC)used in the topical nasal preparations has correlations with exacerbation of RM, as it may increase the risk of developingRM by inducing mucosal swelling.[3][4][5].However, thisis arguably open to debateasthere is no evidence of worsening congestion inthosewho use intranasal corticosteroids containing BKC.[6][7][8]
Epidemiology
It occurs most commonly in young and middle-aged adults with a similar rate in men and women. The incidence has been reported to range from 1% to 9% of otolaryngology clinics.[9]This figure may be anunderrepresentation due to over-the-counter availability of these medications.
Pathophysiology
Several hypotheses have been postulated with rhinitis medicamentosa, although the exact pathophysiology is still unknown[2][10][11]:
Hypothesis 1: Chronic vasoconstriction leads to ischemia of the nasal mucosa, which predisposes to interstitial edema
Hypothesis 2: Fatigue of the constrictor mechanisms occurs resulting in reactive hyperemia and congestion; this subsequently correlates with reduced sensitivity to endogenous catecholamines, where the adrenoreceptors become refractory to nasal decongestants, necessitating higher dosage of medication (tachyphylaxis)
Hypothesis 3: Alteration in vasomotor tone results in increased vascular permeability and edema
Hypothesis 4: The beta-adrenoreceptor activity may outlast the alpha effects leading to rebound vasodilatation
Histopathology
Multiple histological changeshave been described in rhinitis medicamentosa based on animal studies. These include loss of nasociliary function,goblet cell hyperplasia, epithelial edema, squamous cell metaplasia, increased mucus production,increased number of lymphocytes, plasma cells, fibroblasts, and epidermal growth factor receptor.However, results in human studies have been inconclusive.[2]
History and Physical
The patient typically reports a recurrence of nasal congestion, particularly without rhinorrhea on a background of prolonged use of an intranasal decongestant. Severe nasal congestion may lead to oral breathing, dry mouth, and snoring. Clinical examination will reveal nasal mucosa swelling, erythematous and granular appearances. Pale and edematous appearances have also been noted.[12] As the disease progresses, the nasal membrane becomes atrophic and crusty.[13]
Evaluation
The determination of RM on clinical grounds and there are no definitive biochemical tests or imaging studies that can confirm this. Therefore, careful assessment of symptoms, history, and examination is imperative in formulating an accurate diagnosis. It is also vital to acknowledge that other sinonasal conditions may co-exist with RM.
Treatment / Management
The treatment of RM involves the discontinuation of the topical decongestant. Patients must receive counsel that the nasal congestion may temporarily worsen upon discontinuation of the topical decongestant so that they do not perceive it as treatment failure. The use of intranasal corticosteroids has been reported to minimize the symptoms of rebound congestionin both animal studies and several small human trials.[2] Other treatment modalities during withdrawal period involve the use of short-course oral corticosteroids (e.g., prednisone, 0.5 mg per kg for five days), oral antihistamines and inferior turbinate steroid injections, oral adenosine and mast cell stabilizing agents; however, these recommendations are based on limited case reports.[2]
Differential Diagnosis
Allergic rhinitis
Non-allergic rhinitis
CPAP-related rhinitis
Rhinosinusitis
Prognosis
It takes approximately one year for complete recovery in cases of long-term overuse.[14]
Complications
Chronic ethmoiditis[15]
Atrophic rhinitis[15]
Septal perforation
Chronic rhinosinusitis
Turbinate hyperplasia
Consultations
In complicated cases or where diagnosis is unclear, further expert input from the allergist,immunologist,or otorhinolaryngologistis advised.
Deterrence and Patient Education
Patients should receive education on the side-effects of overusing intranasal decongestant before prescribing the medication. It is understandably challenging as these medications are generallyreadily available over the counter.
Patients should be warned that repeated short term use, of an intranasal decongestant even after a year of discontinuation can cause recurrence of RM.[16]
Enhancing Healthcare Team Outcomes
Rhinitis medicamentosia is a preventable condition, and therefore awareness about the complication of overuse among both healthcare professionals and patients is essential. All members of the interprofessional team should help manage the condition, from the clinician, who may prescribe the agents that cause it or treat it, to the pharmacist who can detect a trend in medication use that leads to it, and should report their findings to the patient's clinician, to the nurse who can work directly with the clinician and counsel and help the patient use medication correctly. Interprofessional collaboration can alleviate patient suffering in this condition. [Level 5]
Review Questions
References
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Bernstein IL. Is the use of benzalkonium chloride as a preservative for nasal formulations a safety concern? A cautionary note based on compromised mucociliary transport. J Allergy Clin Immunol. 2000 Jan;105(1 Pt 1):39-44. [PubMed: 10629450]
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Mortuaire G, de Gabory L, François M, Massé G, Bloch F, Brion N, Jankowski R, Serrano E. Rebound congestion and rhinitis medicamentosa: nasal decongestants in clinical practice. Critical review of the literature by a medical panel. Eur Ann Otorhinolaryngol Head Neck Dis. 2013 Jun;130(3):137-44. [PubMed: 23375990]
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Graf P. Adverse effects of benzalkonium chloride on the nasal mucosa: allergic rhinitis and rhinitis medicamentosa. Clin Ther. 1999 Oct;21(10):1749-55. [PubMed: 10566570]
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Blue JA. Rhinitis medicamentosa. Ann Allergy. 1968 Aug;26(8):425-9. [PubMed: 4175448]
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Baldwin RL. Rhinitis medicamentosa (an approach to treatment). J Med Assoc State Ala. 1975 Aug;47(2):33-5. [PubMed: 70495]
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Hallén H, Enerdal J, Graf P. Fluticasone propionate nasal spray is more effective and has a faster onset of action than placebo in treatment of rhinitis medicamentosa. Clin Exp Allergy. 1997 May;27(5):552-8. [PubMed: 9179430]
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Graf P. Rhinitis medicamentosa: aspects of pathophysiology and treatment. Allergy. 1997;52(40 Suppl):28-34. [PubMed: 9353558]
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Graf P, Hallén H. One-week use of oxymetazoline nasal spray in patients with rhinitis medicamentosa 1 year after treatment. ORL J Otorhinolaryngol Relat Spec. 1997 Jan-Feb;59(1):39-44. [PubMed: 9104748]
Disclosure: Nur Wahidah Wahid declares no relevant financial relationships with ineligible companies.
Disclosure: Carl Shermetaro declares no relevant financial relationships with ineligible companies.
