Penile Swelling is NOT a Documented Adverse Effect of Cefuroxime
Penile swelling is not listed as a known adverse effect of cefuroxime in the FDA drug label or current medical literature. The FDA label for cefuroxime does not mention penile swelling, genital swelling, or any similar localized edema of the genitalia among its documented adverse reactions 1.
What the FDA Label Actually Reports
The official adverse effects of cefuroxime include 1:
- Local reactions: Thrombophlebitis (1 in 60 patients with IV administration)
- Gastrointestinal: Diarrhea (1 in 220), nausea (1 in 440), pseudomembranous colitis
- Hypersensitivity reactions (<1% of patients): Rash (1 in 125), pruritus, urticaria, positive Coombs' test, and rare cases of anaphylaxis, drug fever, erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis
- Hematologic: Decreased hemoglobin/hematocrit (1 in 10), transient eosinophilia (1 in 14)
- Hepatic: Transient elevation in liver enzymes
- Immune system: Angioedema, cutaneous vasculitis (postmarketing)
Important Consideration: Angioedema
While penile swelling specifically is not documented, angioedema is a recognized postmarketing adverse event with cefuroxime 1. Angioedema can theoretically affect any body part, including mucosal and subcutaneous tissues. If a patient presents with penile swelling after cefuroxime administration:
- Consider this a potential manifestation of angioedema, which is a serious hypersensitivity reaction
- Discontinue cefuroxime immediately
- Assess for other signs of allergic reaction (facial swelling, tongue swelling, difficulty breathing, urticaria)
- Manage as an allergic reaction with antihistamines, corticosteroids, or epinephrine depending on severity
Recent Pharmacovigilance Data
Large-scale database analyses from both FAERS and JADER databases (2024-2026) identified significant signals for skin and subcutaneous tissue disorders, immune system disorders, and hepatobiliary disorders 2, 3. However, none of these comprehensive adverse event analyses specifically identified penile or genital swelling as a signal 2, 3.
Clinical Pitfalls to Avoid
- Do not dismiss localized swelling as unrelated to the drug—it could represent early angioedema
- Consider alternative diagnoses: infection, trauma, other medications, or underlying urologic conditions
- If the swelling is part of a broader allergic reaction (DRESS syndrome, anaphylaxis), recognize that cefuroxime can cause severe cutaneous adverse reactions including DRESS syndrome 4 and toxic epidermal necrolysis 5
- Document the reaction thoroughly and report to FDA MedWatch if you suspect a drug-related event
If penile swelling occurs with cefuroxime, treat it as a potential allergic manifestation (angioedema), discontinue the drug, and manage accordingly—even though this specific presentation is not formally documented in the literature.