The present invention provides a medicament for treating a disease involving Nav 1.7 such as neuropathic pain, nociceptive pain, inflammatory pain, small-fiber neuropathy, erythromelalgia, paroxysmal extreme pain disorder, dysuria, and multiple sclerosis, which comprises a compound of formula (I): ##STR00001## or a pharmaceutically acceptable salt thereof, wherein R.sup.1a, R.sup.1b, R.sup.1c and R.sup.1d are hydrogen, halogen, cyano, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or the like, provided that at least one of R.sup.1a, R.sup.1b, R.sup.1c and R.sup.1d is C.sub.6-10 aryl, C.sub.6-10 aryloxy, or the like, R.sup.2 and R.sup.3 are hydrogen, C.sub.1-6 alkyl, C.sub.3-10 cycloalkyl, or the like, R.sup.4 is hydrogen, C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, or the like, m is 1, 2 or 3, L is CR.sup.7R.sup.8, and R.sup.7 and R.sup.8 are hydrogen, hydroxyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, or the like.

Sumitomo Dainippon Pharma Co., Ltd.

dysuria/uždegimas

Benzimidazole compounds and medical uses thereof

Benzimidazole compound and medical use thereof

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