Management of Hives Following Doxycycline in Non-Gonococcal Urethritis

Immediate Action Required

The Centers for Disease Control and Prevention recommends stopping doxycycline immediately upon development of hives, as this represents a hypersensitivity reaction that could progress to more severe manifestations, and switching to azithromycin 1 g orally as a single dose, which is an excellent alternative therapy 1
Small hives indicate an IgE-mediated allergic response that contraindicates continued tetracycline use, according to the CDC 2

The CDC recommends switching to azithromycin 1 g orally as a single dose, which avoids cross-reactivity with tetracyclines and is an effective alternative for non-gonococcal urethritis 1
Erythromycin base 500 mg orally four times daily for 7 days is an alternative option, as recommended by the CDC 1
Erythromycin ethylsuccinate 800 mg orally four times daily for 7 days is another alternative option, as recommended by the CDC 1
Ofloxacin 300 mg orally twice daily for 7 days is an alternative option, as recommended by the CDC 6

Antihistamines, such as diphenhydramine or hydroxyzine, can be administered for symptomatic relief of hives, as recommended by the CDC 2
Patients should be monitored for progression to angioedema, respiratory symptoms, or anaphylaxis, which would require emergency intervention, according to the CDC 2

All sexual partners with contact within 60 days of diagnosis must be evaluated and treated with an appropriate alternative regimen, as recommended by the CDC 6
Both patient and partners should abstain from sexual intercourse for 7 days after single-dose azithromycin therapy, as recommended by the CDC 4

Patients should return for evaluation if symptoms persist or recur after completing alternative therapy, as recommended by the CDC 1
Test-of-cure is not routinely recommended after azithromycin unless symptoms persist or reinfection is suspected, according to the CDC 4

Desensitization for doxycycline-induced hives should not be attempted, as excellent alternatives exist, according to the CDC 2
Other tetracyclines, such as minocycline and tetracycline, should not be used as alternatives due to cross-reactivity within the tetracycline class, as recommended by the CDC 2