Yes, I had the exact same symptoms. Vague dizziness, uneasiness, inability to focus. Thought it was coffee, then I thought it was just me. I eliminated everything (coffee, alcohol, even my daily 81 mg aspirin); I never suspected the daily multivitamin, which I have taken for years. Felt better once I stopped it; for me, I am sure it was the cause. I have gone back a cup of coffee every other day with no side effects. Multivitamins can be packed with 150-200% of daily needs; maybe the liver gets taxed after awhile, and we are getting a mild toxicity?