 [ Symptoms ] i was walking my dog and may have gotten poison ivy how do i get rid of the itching do i have to bathe my dog [ Disease ] many most in fact causes of bronchitis are viral so the z pack may have done nothing the prednisone may be helpful for a reactiveallergic cough but this does not cure a virus either neither medicine nor your disease should have a direct effect on your period so you may need to consult your doctor yet again to take your evaluation and treatment up another notch