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Letter in Response to Previous Publication

Intravenous pulsed corticosteroids for leprosy neuritis: Logical or irrational?

Department of Dermatology, Venereology & Leprology, Postgraduate Institute of Medical Education & Research, Chandigarh, Chandigarh, India
Department of Dermatology, Shalby Hospital, SAS Nagar, Punjab, India
Corresponding Author: Dr. Tarun Narang, Associate Professor, Department of Dermatology, Venereology & Leprology, Postgraduate Institute of Medical Education & Research, Chandigarh, Chandigarh, India.
This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, transform, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

How to cite this article: Mehta H, Narang T, Dogra S, Kumar B. Intravenous pulsed corticosteroids for leprosy neuritis: Logical or irrational?. Indian J Dermatol Venereol Leprol doi: 10.25259/IJDVL_237_2022


We read with interest the letter by Lugão et al. “Methylprednisolone pulse therapy for leprosy neuritis: A retrospective study with sensory testing and peripheral nerve ultrasonography correlation”,1 describing the successful use of suprapharmacological dose of methylprednisolone given intravenously for leprous neuritis. We critically reviewed this publication and the existing literature to discern whether this was a prudent therapeutic choice.

The publication is unclear about the inclusion criteria. Five patients were administered steroid pulse as the initial treatment, two received it after two months and several others after up to 72 months of oral steroid therapy. However, in Table 1 “months of prednisolone use before pulses” has been mentioned twice with varying figures.

It is imperative to know which signs/symptoms the authors wished to ameliorate and how were they monitored. It is very important to fix the duration of therapy- the ‘end point’- and not–up to 72 months of oral steroids and then with an average of 25 pulses- making a total duration of eight years.

In the absence of this information, at least the signs reflected by sensory testing worsened significantly in 20% of the patients. The observed reduction of hypervascularity on ultrasonography in the nerve strangely did not reflect the corresponding reduction in its diameter.

Neuropathy in leprosy is the basic pathology that needs corticosteroids only during the pain of acute neuritis or significant nerve function impairment of recent onset. Continuation of high doses of oral steroids up to 80 mg/day for as long as 72 months without considering dose reduction or any steroid-sparing agent defies all pharmacological recommendations and also those of any leprosy expert group. In patients with prolonged neuritis as in those with persistent reaction, other causes of recalcitrance like drug resistance should have been considered.

Claimed reduction in the dose of thalidomide may not be relevant as thalidomide is not recommended for the treatment of leprosy neuritis. That the maximum dose of 200 mg given for patients with erythema nodosum leprosum is inadequate is another issue that needs attention.

Adverse effects are associated with prolonged steroid use, especially adrenal suppression, and the I/V administration of steroids restricts this approach to only specialised centres. Further, the use of pulse therapy in patients with neuropathy associated with diabetes may be imprudent, as steroids worsen diabetes and subsequently neuropathy. So, the inference that reduction of steroid dose after pulse therapy in diabetics may be beneficial based on the observations on only four patients may be too premature. The authors also used an arbitrary modification of the established pulse regimen without giving any valid reason.

In the TRIPOD-3 study, systemic corticosteroids did not significantly impact the course of nerve function impairment because of spontaneous improvement.2 A randomized controlled double-blind trial comparing methylprednisolone pulse therapy and oral steroids showed no lasting difference between the two regimens by day 337.3

The biological half-life of methylprednisolone is 12–36 hours, hence the administration of pulse provides suprapharmacological levels for three days and ineffective levels during the rest of the month. Rao et al. compared three steroid regimens in leprosy patients having type 1 reaction with neuritis and concluded that a longer duration was more effective than the higher dose.4 Mahajan et al. administered dexamethasone pulse therapy in three patients of erythema nodosum leprosum, unresponsive to oral prednisolone at 80 mg daily.5 However, early remission of reaction had to be maintained with oral azathioprine, suggesting that the action of pulse is short-lived. The persistent need for pulse therapy for up to 33 months in the present study further undermines its real utility.1

It is important to remember that neuritis is not the sole manifestation of leprosy reactions, hence choosing therapy only on the basis of this one manifestation is not a judicious approach. It would be very informative to know how the authors continued labelling these patients as ‘pure leprous neuritis’, and did not consider ‘neuropathic pain’, long after the completion of multidrug therapy in any of them. While oral prednisolone given for short periods appears to be mostly safe in relation to reactivation of leprosy, similar safety data is unavailable for their long-term use in high doses.

In conclusion, current literature does not support the use of pulsed corticosteroids in leprosy neuritis.

Declaration of patient consent

Patient’s consent not required as there are no patients in this study.

Financial support and sponsorship


Conflicts of interest

There are no conflicts of interest.


  1. , , , , , . Methylprednisolone pulse therapy for leprosy neuritis: A retrospective study with sensory testing and peripheral nerve ultrasonography correlation. Indian J Dermatol Venereol Leprol. 2021;88:114-6.
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