Hello Doctor, Can Maxtra syrup and Allegra be given together? My son first was given Maxtra for running nose, then he started having blocked nose, mouth breathing, snoring. Then, he was advised to take Allegra for about 7 days, if the symptoms subsided then to be continued for 14days. On the eighth day, started with nasal discharge(yellowish to green in color). when approached an ENT, he was advised to take both maxtra and allegra. Now, at this moment, we are totally confused