Efficacy of tokishakuyakusan and mecobalamin on post-infectious olfactory dysfunction: A prospective multicenter study

To determine if tokishakuyakusan (TSS) is effective for treating post-infectious olfactory dysfunction (PIOD) compared with vitamin B12 (mecobalamin). We conducted a randomized, nonblinded clinical trial. Patients with PIOD enrolled in 17 hospitals and clinics from 2016 to 2020 were randomly divided...

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Veröffentlicht in:Auris, nasus, larynx nasus, larynx, 2024-02, Vol.51 (1), p.99-105
Hauptverfasser: Kobayashi, Masayoshi, Miwa, Takaki, Mori, Eri, Shiga, Hideaki, Tsuzuki, Kenzo, Okutani, Fumino, Hayama, Masaki, Akazawa, Hitoshi, Nakamura, Yosuke, Suzuki, Motohiko, Matsuwaki, Yoshinori, Ogino, Eriko, Shikina, Takashi, Ikeda, Katsuhisa, Hyo, Yukiyoshi, Kashiwagi, Takashi, Kondo, Kenji, Shibata, Minori, Ueno, Takayoshi
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container_end_page 105
container_issue 1
container_start_page 99
container_title Auris, nasus, larynx
container_volume 51
creator Kobayashi, Masayoshi
Miwa, Takaki
Mori, Eri
Shiga, Hideaki
Tsuzuki, Kenzo
Okutani, Fumino
Hayama, Masaki
Akazawa, Hitoshi
Nakamura, Yosuke
Suzuki, Motohiko
Matsuwaki, Yoshinori
Ogino, Eriko
Shikina, Takashi
Ikeda, Katsuhisa
Hyo, Yukiyoshi
Kashiwagi, Takashi
Kondo, Kenji
Shibata, Minori
Ueno, Takayoshi
description To determine if tokishakuyakusan (TSS) is effective for treating post-infectious olfactory dysfunction (PIOD) compared with vitamin B12 (mecobalamin). We conducted a randomized, nonblinded clinical trial. Patients with PIOD enrolled in 17 hospitals and clinics from 2016 to 2020 were randomly divided into two groups, and we administered TSS or mecobalamin for 24 weeks. Their olfactory function was examined using interviews and T&T olfactometry. The improvement of olfactory dysfunction was assessed following the criteria of the Japanese Rhinologic Society. Overall, 82 patients with PIOD were enrolled in this study. In the TSS and mecobalamin groups, 39 patients completed the medication regimen. In the TSS and mecobalamin groups, olfactory dysfunction was significantly improved based on self-reports and olfactory test results. The improvement rate of olfactory dysfunction was 56% in the TSS group and 59% in the mecobalamin group. Early intervention within 3 months produced a better prognosis than the treatment initiated after 4 months. Furthermore, age and sex differences were not observed. Both medications produced no severe adverse events. The present study showed that TSS and mecobalamin might be useful for treating PIOD.
doi_str_mv 10.1016/j.anl.2023.04.010
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subjects Drugs, Chinese Herbal
Female
Humans
Male
Mecobalamin
Olfaction Disorders - drug therapy
Olfaction Disorders - etiology
Post-infectious olfactory dysfunction
Prospective Studies
Self-administered odor questionnaire
Smell
T&T olfactometry
Tokishakuyakusan
Visual analogue scale
Vitamin B 12 - analogs & derivatives
title Efficacy of tokishakuyakusan and mecobalamin on post-infectious olfactory dysfunction: A prospective multicenter study
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