Lucy, I've also experienced this extreem dizzyness After each time my dentist placed mercury fillings IN my teeth. I was about 12 years old then-- and recall it vividly. Sitting in the back seat of the car after my tooth filling appointments, I would be so spaced out that I wondered if that was how it was like when you were drunk or high.

The mercury vapor inhaled in from them drilling out the old fillings also caused a slight degree of dizzyness- and I feel this could be what he went through also.

Have him take some Algin , Vitamin C with bioflavonoids, Activated Charcoal right now daily-- and do a little colon cleanse so he doesnt re-absorb any mercury in the colon.