Elsevier

Acute Pain

Volume 9, Issue 4, December 2007, Pages 221-227
Acute Pain

Anaphylactic reaction after intravenous dipyrone

https://doi.org/10.1016/j.acpain.2007.08.025Get rights and content

Summary

Dipyrone (metamizol), a non-opioid analgesic, is widely used for acute and chronic pain management. Although not marketed in all countries because of concerns of possible side effects like agranulocytosis, this potent analgesic is frequently used worldwide.

A severe anaphylactic reaction without any cutaneous symptoms was observed after intravenous infusion of dipyrone 1 g. Further symptoms were a short lasting increase in airway pressure and a pronounced generalized oedema. Circulatory arrest required cardiopulmonary resuscitation. Pre-existing β-blockade aggravated poor response to adrenaline. Recovery of the patient was uneventful.

Previous case reports demonstrated that symptoms of allergic reaction after dipyrone might vary considerably. Erythema, bronchospasm and eyelid-/angio-oedema might present alone or in combination. Sole cardiovascular collapse produced by extreme generalized oedema and consecutive hypotension occurred after i.v. administration during anaesthesia. Risk factors for severe dipyrone induced allergy are: allergies/intolerability of dipyrone and other non-opioids and bronchial asthma. However, allergic reaction after previous intake of dipyrone without side effects has been described.

Introduction

The pyrazolone derivate dipyrone (metamizol) belongs to the non-opioid analgesics and is used for acute and chronic pain management [1]. This drug can be administered orally as tablets or drops, intravenously, intramuscularly or rectally in children and adults and provides analgesic, antipyretic and spasmolytic properties. Therefore, it covers a broad spectrum of indications. In Germany, dipyrone is a widely prescribed drug for acute and chronic pain management. In the postoperative setting, it is one of the most powerful non-opioid analgesics marketed up to date. Its opioid sparing effect has been demonstrated in several investigations [2], [3]. Since it lacks side effects on the gastrointestinal tract and has no clinically significant influence on the coagulation pathway, it is well tolerated by patients.

However, dipyrone is banned in some countries because of its association with incidents of agranulocytosis [4]. The frequency of this adverse effect is still controversial [5], [6], [7], [8]. Nevertheless, dipyrone has remained very popular (e.g. in Austria, Belgium, France, Germany, Italy, the Netherlands, Turkey, Spain, Switzerland, South Africa, Latin America, Russia) since it is efficacious at low cost and can be administered by different routes. However, like in other non-opioid analgesics, allergic and anaphylactic reactions may occur. A case report with detailed documentation of the anaphylactic event and a review of cases presenting a comparable adverse drug reaction are reported.

Section snippets

Case report

A 75-year-old woman (67 kg, 168 cm) was scheduled for gynaecologic laparotomy because of a cystic adnex tumor. A history of endocarditis in 1983, a liver cirrhosis Child A of unknown origin, and a partial thrombosis of the portal vein was reported. Regular medication consisted of propanolol 2× 10 mg, furosemide 50 mg and jodid 200 μg/day. The patient suffered from an insulin dependent type II diabetes mellitus and during preoperative evaluation she mentioned an allergic reaction with urticaria

Discussion

In a Swiss investigation the rate of severe life-threatening anaphylaxis with circulatory signs was found to be 7.9–9.6/100,000 inhabitants per year [9]. Focussing on hospital admissions only, anaphylactic and anaphylactoid reactions are estimated to occur at a rate of 1:5000 [10]. For most non-opioid analgesics, the incidence of anaphylaxis was in the range of 5–15 cases/100,000 exposed patients [11]. Among the individual analgesics, the estimates ranged from 2.1/100,000 for oral aspirin to

Conclusions

  • Symptoms of allergic reaction after dipyrone might vary considerably. Erythema, bronchospasm and eyelid-/angio-oedema might present alone or in combination.

  • Sole cardiovascular collapse produced by extreme generalized oedema and consecutive hypotension is described after i.v. administration during anaesthesia.

  • Risk factors for severe dipyrone induced allergy are: allergies/intolerability of dipyrone and other non-opioids (patient's history, allergy pass!) and bronchial asthma

  • Allergic reaction to

Conflict of interest statement

There is no conflict of interest.

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