Reviewed clinical summary · Source-linked · Educational use only

Does NAC Help Treat Diabetic Foot Bone Infections?

Clinical Bottom Line

Summary: In patients with diabetic foot osteomyelitis (DFO), oral N-acetyl-cysteine (NAC) 600 mg twice daily as an adjuvant therapy significantly accelerated antibiotic responses and reduced infectious inflammatory markers during therapy compared to standard therapy without NAC, though it was associated with minimal…

Summary: In patients with diabetic foot osteomyelitis (DFO), oral N-acetyl-cysteine (NAC) 600 mg twice daily as an adjuvant therapy significantly accelerated antibiotic responses and reduced infectious inflammatory markers during therapy compared to standard therapy without NAC, though it was associated with minimal side effects.
PICO Description
Population Patients diagnosed with diabetic foot osteomyelitis (DFO).
Intervention Oral N-acetyl-cysteine (NAC) 600 mg administered twice daily as an adjuvant to standard therapy.
Comparison Standard therapy without the addition of NAC.
Outcome NAC significantly accelerated antibiotic responses and reduced infectious inflammatory markers during treatment with minimal side effects. The overall trend showed faster improvement in DFO-related infection markers.
RCT Arch Iran Med · 2025

NAC adjuvant for diabetic foot osteomyelitis

Open-label RCT · diabetic foot osteomyelitis · 3 weeks

Trial design
Wagner III/IV DFO Enrolled & assessed RANDOMISED 1:1 NAC + standard NAC 600 mg twice daily n = 27 Standard therapy Antibiotics alone n = 26 Change in ESR and CRP from baseline
Change from baseline — both arms
ESR (mm/h), change from baseline Baseline Week 3 -49.4 vs -7.2 mm/h NAC + standard Standard therapy
ESR drop (NAC)
-49.4 mm/h
vs -7.2 control
CRP drop (NAC)
-44.4 mg/L
vs -14.0 control
Completed
53 patients
grade III/IV
Tolerability
Minimal AEs
well tolerated
⬡ Bottom Line

Adding oral NAC 600 mg twice daily accelerated the fall in ESR and CRP versus standard antibiotic therapy alone in diabetic foot osteomyelitis, with minimal side effects.

Source: Laya Hooshmand Gharabagh, et al. “Efficacy Of N-Acetyl-Cysteine as Adjuvant Therapy for Diabetic Foot Osteomyelitis: An Open-Label Randomized Controlled Trial.” Read article here.

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