How are you? Aside from the severe sore throat with swelling, what other symptoms are present? What tests were done? Medications may indeed cause allergic reactions - rash, difficulty of breathing or swelling or inflammation of membranes. With allergy, it is important to discontinue possible allergen and take antihistamine medications. It would also help if you have your throat checked or a swab taken to rule out infectious causes. Drink plenty of fluids and check with your doctor for proper evaluation. Diagnostic tests such as allergy testing may also help. Take care and do keep us posted.
Thanks for replying to my post. My symptoms also included sinus congestion and a productive cough (green). I am now glad to report that I am feeling better. I stopped the multi-vitamin a second time and all symptoms were gone in 2 days. However, I do still have a dry cough. I have not had an opportunity to have a allergy test, but I do plan to do so. Thanks again!