Pycnogenol- a brand name for a pine bark extract-may help  people with tinnitus, a difficult to treat condition, which may be connected with insufficient blood flow to the ears.
100 to 150 mg of Pycnogenol per day [divided in 2 to 3 doses] may cause a significant improvement within a month  
For patients with Meniere and tinnitus 150 mg daily for half a year may cause a clear improvement.
Worth trying. Not all brands maybe equal!

2 good brands: https://www.iherb.com/tr/cb?pcodes=NOW-03277qty1sid0_NWY-45151qty1sid0&v=2&rcode=RKK609