Treatment of Tertiary Syphilis with Penicillin Allergy — Gummatous or Cardiovascular Disease
This protocol addresses tertiary syphilis when standard parenteral penicillin therapy is not possible — specifically when the patient has a documented penicillin allergy or declines parenteral treatment. The clinical picture may include gummatous skin or visceral disease, or cardiovascular involvement.
Clinical scenario
Patients present with one of the following forms of tertiary syphilis:
- Gummatous syphilis: nodules, plaques, or ulcers affecting skin, mucosae, or visceral organs.
- Cardiovascular syphilis: aortic regurgitation, stenosis of coronary ostia, or aortic aneurysm (mainly thoracic).
The defining constraint is a history of penicillin allergy or refusal of parenteral treatment, which excludes the standard first-choice regimen.
Treatment approach (partial summary)
An oral antibiotic course is the alternative when penicillin cannot be used.
Some specialists favour penicillin desensitization over non-penicillin alternatives, given the limited evidence base for oral regimens in this setting — the full protocol details which approach applies and when.
References
DOI: 10.1111/jdv.16946
- Gummatous syphilis: nodules/plaques or ulcers (skin, mucosae, visceral);
- Cardiovascular syphilis: aortic regurgitation, stenosis of coronary ostia, aortic aneurysm (mainly thoracic).
- Some specialists recommend penicillin desensitization because the evidence base for the effectiveness of non-penicillin regimens is weak.
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