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.
Luckily, beetroots are just one of many vegetables and herbs that are high in nitrate. Leafy green vegetables tend to be the top sources of nitrate: 1  High nitrate levels (~100-250 mg/100 g): basil, celeriac, Chinese cabbage, chard, coriander, endive, fennel, kohlrabi, leek, mustard greens, parsley. Nitrate-containing vegetable juice presents a potential risk if stored incorrectly. 2  If the juice gets contaminated by bacteria that can convert nitrate to nitrite, high levels of nitrite could accumulate over time which could potentially be harmful. 3  Nitrate ingestion from dietary sources, such as vegetables, is safe.