Shake the oral suspension (liquid) well just before you measure a dose. I feel wiped out completely and can't concentrate for more than a few minutes at a time, its a real weird feeling. Nasty side effects using Allegra-D 12 hr. Applies to fexofenadine: oral suspension, oral tablet, oral tablet disintegrating. You may report them to the The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. Do not take extra medicine to make up the missed dose.Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.Overdose symptoms may include dry mouth, dizziness, or drowsiness.Avoid using antacids within 15 minutes before or after taking a medication that contains Allegra. Our Allegra Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication. The side effects of taking the depakote are such a pain in the butt. Finally passing out from exhaustion. Been diagnosed with depression, anxiety and complicated migraines in the past. If you do not have a dose-measuring device, ask your pharmacist for one.To take fexofenadine orally disintegrating tablets (Allegra ODT):Keep the tablet in its blister pack until you are ready to take the medicine. Get emergency medical help if you have any of these signs of an allergic reaction to Allegra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Allegra-D (fexofenadine hcl and pseudoephedrine hcl) is a combination of an antihistamine and a decongestant used to treat sneezing, cough, runny or stuffy nose, itchy or watery eyes, hives, skin rash, itching, and other symptoms of allergies and the common cold.Allegra-D is available in generic form and over-the-counter. Less serious Allegra side effects may include: Allegra has helped me get through many things with no side effects. Never use more than the recommended dose.Ask a doctor or pharmacist if it is safe for you to take Allegra if you are allergic to any drugs, or if you have kidney disease.FDA pregnancy category C. It is not known whether Allegra will harm an unborn baby. Dizziness, tingling on face and scalp, anxiety. If you are taking the medication regularly, take the missed dose as soon as you remember. You may report side effects to FDA at 1-800-FDA-1088. Do not use this medication without telling your doctor if you are breast-feeding a baby. You may report side effects to FDA at 1-800-FDA-1088.Before taking this medication, tell your doctor if you regularly use other medicines that make you sleepy (such as cold or allergy medicine, sedatives, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). Side Effects. Do not use any other type of liquid. Select one or more newsletters to continue. The rapidly-dissolving tablets may contain aspartame. Allegra oral suspension (liquid) may be used in children ages 2 through 11. Take the tablet/capsule or liquid form of this medication with or without food. Version: 10.02.The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. Dizziness, tingling on face and scalp, anxiety. Tell your doctor if you have serious side effects of Allegra-D including: These side effects may go away during treatment as your body adjusts to the medicine. Call your doctor for medical advice about side effects. Cerner Multum, Inc. "UK Summary of Product Characteristics."