The Journal of International
Advanced Otology
Original Article

Effect of a 4-Week Treatment with Cilostazol in Patients with Chronic Tinnitus: A Randomized, Prospective, Placebo-controlled, Double-blind, Pilot Study


Department of Otolaryngology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea


Department of Otolaryngology, Kangwon National University, School of Medicine, Chuncheon, Korea


Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea


Department of Otolaryngology, Jeju National University Hospital, Jeju, Korea


Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, Seoul, Korea

J Int Adv Otol 2016; 12: 170-176
DOI: 10.5152/iao.2016.2682
Read: 1561 Downloads: 893 Published: 03 September 2019


OBJECTIVE: The aim of this prospective, double-blind, randomized, placebo-controlled study was to evaluate the efficacy of cilostazol, a selective phosphodiesterase 3 inhibitor, in patients with chronic tinnitus.


MATERIALS and METHODS: Adult patients of chronic tinnitus lasting more than 3 months were included. Fifty eligible patients were randomly assigned to either cilostazol or control (placebo) group. The study medication of oral 100-mg cilostazol and a matching placebo were used twice a day for 4 weeks. Subjective tinnitus severity was evaluated using the visual analog scale (VAS), tinnitus handicap inventory (THI), and Short-Form 36 health survey (SF-36) at baseline and at 2 and 4 weeks after study initiation. Changes in tinnitus pitch and loudness matching values were also analyzed.


RESULTS: The improvement range in the VAS score was significantly greater in the cilostazol group than in the placebo group after 4 weeks’ administration of cilostazol. The SF-36 subscales also showed improvement in quality of life in the physical component summary subscale, the aggregate subscale of the physical category. There were no significant improvements in the cilostazol group compared to the placebo group in the THI subscales and tinnitus characteristics of pitch and loudness matching values. Various degrees of headaches were experienced by 68% of patients in the cilostazol group.



CONCLUSION: A 4-week administration of oral cilostazol in patients with chronic tinnitus may mitigate the severity of subjective tinnitus.

EISSN 2148-3817