What are potential long-term side effects of cetirizine and pseudoephedrine?

Sorry to hear that your child has developed hives after an episode of viral illness. I agree with Dr Colin Theng that a viral infection is most likely the trigger for this episode and antihistamines such as cetirizine would be the mainstay of treatment. I would usually optimise the dose of antihistamines for good control. If the maximum dose is still not able to control your child's hives, then a course of prednisolone may need to be considered. These medicines will help to switch off the activity of mast cells which have gone into overdrive, causing the appearance of hives.

What is Celiac Disease? Celiac disease is characterized by the immune system associated degeneration of the small bowel's inner lining due to sensitivity to gluten-containing food. Symptoms of Celiac Disease? Early symptoms of Celiac Disease include: loose stools possibly weight loss. However, the spectrum of presentation may vary from person to person. Some people may present symptoms such as: Mild symptoms similar to IBS (irritable bowel syndrome) Bloating Cramps Lethargy.