Effect of lidocaine on kanamycin injection-site pain in patients with multidrug-resistant tuberculosis
OBJECTIVE AND DESIGN: We performed a randomised single-blinded crossover study to determine if lidocaine reduces KM injection-site pain. We recruited patients aged 18 years on MDR-TB treatment at two TB hospitals in Cape Town, South Africa. KM pharmacokinetic parameters and a validated numeric pain scale were used at intervals over 10 h following the injection of KM with and without lidocaine on two separate occasions.
RESULTS: Twenty participants completed the study: 11 were males, the median age was 36 years, 11 were HIV-infected, and the median body mass index was 17.5 kg/m2. The highest pain scores occurred early, and the median pain score was 0 by 30 min. The use of lidocaine with KM significantly reduced pain at the time of injection and 15 min post-dose. On multiple regression analysis, lidocaine halved pain scores (adjusted OR 0.5, 95%CI 0.3–0.9). The area under the curve at 0–10 h of KM with and without lidocaine was respectively 147.7 and 143.6 μg·h/ml.
CONCLUSION: Lidocaine significantly reduces early injection-site pain and has no effect on KM pharmacokinetics.
Document Type: Research Article
Affiliations: 1: Division of Clinical Pharmacology, Department of Medicine 2: Clinical Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town 3: Brooklyn Chest Hospital, Cape Town 4: D P Marais Hospital, Cape Town, South Africa 5: Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, Texas, USA
Publication date: August 1, 2018
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