Hi, I am 30 years old and have very bad allergy from last 3 years but it have got worse this year. My nose is blocked all the time, my eyes, ears, throat itches me most of the time. And some times I keep sneezing or watery eyes. I use histal dc and otrivin drops, vitamin c 500 regularly and I get immediate relief . Is there any thing else that I can do? And is there any side effects of using histal. I am planning for my second baby too.