a few years back i had a fall while scrambling on a small mountain out here. i slid about 20-30 feet before being knocked unconscious. since then, i've had an increasing sense of vertigo or balance disorder that comes on when i am overlooking a steep drop. i've had it at low and high elevations and it usually comes on slowly... but over time i feel dizzier and dizzier until im off the section of the mountain that overlooks a big drop or descends steeply.
the most recent occurence was last week on san gorgonio (southern california). i'd ascended 4000 feet and about 9 miles. i'd kept on top of electrolytes, food, and water. my hr stayed primarily in the 65-80% range the majority of the hike. drinking water seemed to help a little but finally, at 600' below the summit, i had to turn around because i was stumbling from my dizziness and that's not a smart thing to do on a narrow ridge trail overlooking a 1000'+ drop.
so my question: what can i do about this? i met someone who recommended taking b1, zinc, and iodine as a way to settle my stomach better and to therefore help the other processes that affect the dizziness, but im not sure if there's support for this.
any ideas?