Yes, 6.2 is too high.
If you know for a fact the dizziness is from allopurinol and the side effects don’t improve over time, ask your doctor about alternatives to allopurinol.
If you haven’t tried it yet, the main alternative is febuxostat (sold as Uloric in the US and Adenuric in Europe). The effect on uric acid is basically the same but the side effects are different. Just a warning: the normal dose might be stronger than you need.
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