I don't take allergy medication, but I know I'm allergic to the drugs sulfa and macrobid. I do get some congestion and reaction o allergens (ragweed etc) but nothing that nose drops and a mild over the counter drug can't handle.
I don't take any kind of medicine unless I am dying. Worked in a pharmacy for 5 years and was told never to take any of the stuff we dispensed. Each drug on the market is designed to make you need another one. I asked another pharmacist about this and she told me that she was also told this in school and agreed with my old boss.
I do have allergy symptoms...no allergies according to tests but deal with a lot of sinus stuff during allergy season