Improvement by Ginkgo biloba and clonazepam (n=38, patients, %)
| Loudness (dB SL) | Loudness VAS | Duration/day | Annoyance | THI | |
| Ginkgo biloba | |||||
| Improvement ≥2/3 | 2 (5.3) | 1 (2.6) | 1 (2.6) | 2 (5.3) | 6 (15.8) |
| 1/3 ≤ improvement <2/3 | 3 (7.9) | 3 (7.9) | 2 (5.3) | 4 (10.5) | 4 (10.5) |
| Improvement <1/3 | 3 (7.9) | 5 (13.2) | 2 (5.3) | 9 (23.7) | 11 (28.9) |
| No change or aggravation | 30 (78.9) | 29 (76.3) | 33 (86.8) | 23 (60.5) | 17 (44.7) |
| Clonazepam | |||||
| Improvement ≥2/3 | 21 (55.3) | 9 (23.7) | 10 (26.3) | 15 (39.5) | 15 (39.5) |
| 1/3 ≤ improvement <2/3 | 4 (10.5) | 8 (21.1) | 10 (26.3) | 8 (21.1) | 3 (7.9) |
| Improvement <1/3 | 3 (7.9) | 8 (21.1) | 4 (10.5) | 7 (18.4) | 5 (13.2) |
| No change or aggravation | 10 (26.3) | 13 (34.2) | 14 (36.8) | 8 (21.1) | 15 (39.5) |
SL, sensation level; THI, Tinnitus Handicap Inventory; VAS, visual analogue scale.