It is intended in this invention to provide novel preventives/remedies for diseases caused by the growth of vascular smooth muscles, for example, re-occlusion occurring after a ballon-dilation treatment for cardiac coronary occlusion. Namely, vascular smooth muscle growth inhibitors, cyclin-dependent kinase complex expression enhancers, preventives/remedies for diseases caused by the growth of vascular smooth muscles, a method for treating these diseases, etc. with the use of, as the active ingredient, 14-membered ring macrolide compounds such as erythromycin, its derivative, roxithromycin or its derivative.
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