Any side effects of taking Allegra while pregnant?

According to the insert, there haven't yet been any studies done. Did anyone take it while pregnant and have/not have side effects?
Update: Do you people realize that Allegra is a prescription drug? Prescription meaning that a doctor sent a note to a pharmacist saying to give it to me.
Update 2: I'm not going to take it. Thanks to the people who actually answered my question.
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