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.
Some of the nitrate rich food includes lettuce, carrots, parsley, cabbage, radishes, collard greens spinach, celery,aragula and beet root. These nitrate rich foods help increase the Nitric oxide levels in man even he is suffering from significant atherosclerosis. When you eat nitrate rich foods, these nitrates are converted into nitrites by the bacteria on your tongue. When these nitrites reach the gut, it converts these nitrites into nitric oxide. This phenomenon certainly increases the nitric oxide levels in your body depending on the amount of nitrate rich foods you eat. The best part is foods rich in nitrates are easy to find and consume.