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Hello from JustAnswer.
Could you provide more detail of what test result was positive?
I had asked for some clarification and have not heard back.
It is unclear what test result you would have had done for a tooth extraction or what test was positive. However, the Lexapro has only been associated with limited alteration in tests, specifically with liver enzyme or bilirubin elevation because of an effect on the liver or an increase in cholesterol levels.
If you can provide any clarification of the testing, then I can provide additional comment.