Has more side effects than Allegra since it has pseudoephedrine in it. The antihistamine (fexofenadine) can cause dizziness, drowsiness, dry eyes/mouth, and constipation. The decongestant (pseudoephedrine) can make your blood pressure higher and can make it harder to sleep.
Food preservatives (or additives) contained in certain foods can trigger headaches. Nitrates and nitrites are additives in: 1  Hot dogs. 2  Ham. 3  Sausage. 4  Bacon. 5  Lunch meats and deli-style meats.6  Pepperoni.7  Other cured or processed meats. 8  Some heart medicines.ood preservatives (or additives) contained in certain foods can trigger headaches. Nitrates and nitrites are additives in: 1  Hot dogs. 2  Ham. 3  Sausage. 4  Bacon. 5  Lunch meats and deli-style meats. 6  Pepperoni. 7  Other cured or processed meats.
Both Nitrates and nitrites are permitted to be used in curing meat and poultry with the exception of bacon, where Nitrate use is prohibited. Sodium nitrite is commonly used in the USA (Cure #1) and everywhere else in the world. Temperature (with higher temperature more nitrite is released from Nitrate). 2  Amount of bacteria present in meat that is needed for Nitrate to produce nitrite and here we do not have any control. 3  The more bacteria present, the more nitrite released.