Anaphylactic reaction after intravenous dipyrone
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
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Symptoms of allergic reaction after dipyrone might vary considerably. Erythema, bronchospasm and eyelid-/angio-oedema might present alone or in combination.
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Sole cardiovascular collapse produced by extreme generalized oedema and consecutive hypotension is described after i.v. administration during anaesthesia.
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Risk factors for severe dipyrone induced allergy are: allergies/intolerability of dipyrone and other non-opioids (patient's history, allergy pass!) and bronchial asthma
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Allergic reaction to
Conflict of interest statement
There is no conflict of interest.
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Dipyrone as pre-emptive measure in postoperative analgesia after tonsillectomy in children: a systematic review
2021, Brazilian Journal of OtorhinolaryngologyCitation Excerpt :In all clinical trials of dipyrone use in the postoperative period of children, the incidence of nausea and vomiting was the same between the active group and the placebo. There are several case reports describing anaphylaxis after administration of the drug.51 For most non-opioid analgesics, the incidence of anaphylaxis is in the range of 5–15 cases/100,000 exposed patients.52
Severe anaphylaxis reaction by dipyrone without a history of hypersensitivity. Case report
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