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Intercostal post-herpetic neuralgia — Clinical Guidelines

Overview

Post-herpetic neuralgia (PHN) is a chronic neuropathic pain condition that persists after the resolution of herpes zoster rash, often affecting elderly individuals 3.

Diagnosis

Persistent pain lasting ≥3 months post-herpes zoster rash 3

Typically involves the dermatome corresponding to the affected nerve root 3

No specific diagnostic tests; clinical history and examination are crucial 3

Management

First-line treatments:

- Gabapentinoids (e.g., gabapentin) and tricyclic antidepressants 3 - Topical lidocaine (10% gel) for localized pain relief 4

Adjunctive treatments:

- Acupuncture combined with moxibustion and cupping therapy shows higher efficacy compared to conventional Western medicine 1 - Topical capsaicin (0.025%) gel can provide pain relief but requires supervision due to potential burning sensation 5

Special Populations

Elderly:

- Increased risk of adverse drug reactions due to pharmacokinetic and pharmacodynamic changes 2 - Re-formulations of antiepileptics with improved tolerability are promising but require further study 2 - Topical treatments like lidocaine and capsaicin may be particularly beneficial due to better tolerability 4 5

Key Recommendations

Utilize gabapentinoids and tricyclic antidepressants as first-line pharmacological treatments for PHN (Evidence: Strong 3)

Consider topical lidocaine for localized pain relief, especially in patients where systemic medications may pose risks (Evidence: Moderate 4)

Explore acupuncture combined with moxibustion and cupping as an adjunctive therapy, given its higher efficacy compared to conventional Western medicine (Evidence: Moderate 1)

For elderly patients, prioritize topical treatments like capsaicin under supervision due to potential benefits and reduced systemic side effects (Evidence: Moderate 5)

Monitor for adverse drug reactions closely in elderly and comorbid patients due to polypharmacy and age-related changes (Evidence: Expert opinion 2)

References

1 Zhou Q, Wei S, Zhu H, Hu Y, Liu Y, Yang H et al.. Acupuncture and moxibustion combined with cupping for the treatment of post-herpetic neuralgia: A meta-analysis. Medicine 2021. link 2 Pickering G. Antiepileptics for post-herpetic neuralgia in the elderly: current and future prospects. Drugs & aging 2014. link 3 Philip A, Thakur R. Post herpetic neuralgia. Journal of palliative medicine 2011. link 4 Rowbotham MC, Fields HL. Topical lidocaine reduces pain in post-herpetic neuralgia. Pain 1989. link90216-9) 5 Watson PNC, Evans RJ, Watt VR. Post-herpetic neuralgia and topical capsaicin. Pain 1988. link90292-8)

Intercostal post-herpetic neuralgia