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.
Foods like hot dogs and pepperoni often contain nitrates, another headache trigger. Some processed foods also are rich in tyramine. A little bit of chocolate usually won't trigger a headache. When chocolate does cause a headache, tyramine is probably the culprit. Very cold foods. An ice cream headache usually comes on quickly and lasts less than a minute. But for some people who experience migraine headaches, eating ice cream can trigger a more prolonged migraine attack. The best way to find what foods and/or drinks cause your headaches is to keep a diary. Every time you have a headache, write down everything you ate and drank before the headache started.