Taking Zyrtec D has allowed me to discontinue my weekly allergy shots. I have struggled with asthma and ear infections for many years. I have had tubes put into my ears and had numerous rounds of antibiotics. Actually, I became immune to a few antibiotics because of the constant use. I tried many other allergy medications but had too many complications taking them. I have taken Zyrtec D for a couple of years now and I continue to control the infections without the shots and antibiotics.