Why should Allegra not be prescribed?
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If Allegra or Allegra-D gives you an allergic reaction, avoid it in the future. Do not give either product to children under 6.
Do not take Allegra-D if you have glaucoma, urination problems, or severe high blood pressure or heart disease. Also avoid taking Allegra-D within 2 weeks of using an MAO-inhibitor drug such as Marplan, Nardil, or Parnate.