Failure of a single day metronidazole desensitization protocol, and success of a modified two-day protocol in an...

Area of Science:

• Infectious Diseases
• Allergy and Immunology
• Pharmacology

Background:

• Metronidazole is a common anti-infective with few alternatives for trichomoniasis, especially for patients with Type 1 hypersensitivity.
• Previous metronidazole desensitization protocols often led to reactions and required intensive care, increasing costs.

Purpose of the Study:

• To describe a novel, successful outpatient two-day metronidazole desensitization regimen for a patient with a history of hypersensitivity.
• To evaluate the safety and efficacy of this adapted desensitization protocol.

Main Methods:

• A patient with a compelling need for metronidazole experienced a reaction to a standard desensitization protocol.
• The protocol was adapted, incorporating symptom management and pre-medication on day two in an outpatient setting.
• The patient was successfully desensitized and completed a full course of metronidazole.

Main Results:

• The adapted two-day outpatient regimen was effective in desensitizing the patient to metronidazole.
• The patient tolerated a full week of metronidazole treatment without requiring acute care resources.
• No adverse events necessitated higher-level care, demonstrating a cost-effective approach.

Conclusions:

• A two-day outpatient metronidazole desensitization protocol can be a safe and effective option for patients with hypersensitivity.
• This adapted regimen offers a viable alternative to standard protocols that may cause reactions and require extensive resources.
• The successful desensitization allowed for necessary treatment of trichomoniasis in a patient with allergy.