Before taking fexofenadine and pseudoephedrine,
tell your doctor and pharmacist if you are allergic to fexofenadine (Allegra), pseudoephedrine (Sudafed, in Dimetapp, in Drixoral, others), any other medications, or any of the ingredients in the tablets. Ask your pharmacist for a list of the ingredients.
do not take fexofenadine and pseudoephedrine if you are taking monoamine oxidase (MAO) inhibitors, including isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl), and tranylcypromine (Parnate), or have taken them within the past 14 days.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: asthma medications; diet pills; digoxin (Digitek, Lanoxin, Lanoxicaps); erythromycin (E.E.S., E-Mycin, Erythrocin); ketoconazole (Nizoral); medications for high blood pressure such as methyldopa (Aldomet) and reserpine (Serpalan, Serpasil, Serpatabs); and over-the-counter antihistamines, decongestants, or stimulants. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
if you are taking an antacid containing aluminum or magnesium (Maalox, Mylanta, others), take the antacid a few hours before or after fexofenadine.
tell your doctor if you have glaucoma, difficulty urinating, high blood pressure, or coronary artery disease (condition that occurs when the blood vessels of the heart are narrowed by fat or cholesterol deposits). Also tell your doctor if you have had symptoms such as insomnia, dizziness, weakness, shaking of a part of your body that you can not control, or a fast, pounding, or irregular heartbeat after taking adrenergic medications such as phenylephrine (Neo-Synephrine), or epinephrine (Primatene Mist, EpiPen). Your doctor may tell you not to take fexofenadine and pseudoephedrine.
tell your doctor if you have or have ever had angina (chest pain or pressure), diabetes, a heart attack, hyperthyroidism (an overactive thyroid gland) , prostatic hypertrophy (an enlarged prostate), or heart or kidney disease.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking fexofenadine and pseudoephedrine, call your doctor.