Reaction to allergy shots?

I began getting hives about a year ago after receiving allergy shots for appromately 1 year. Has this happened to anyone else? I have been offered Xolar but am hesitant to take it because of the listed side effects but double doses of reactin aren't helping. Nice to have a forum to discuss this!

Hi I’m currently receiving the injections , I’m half way through and have made very little difference , still suffer daily , as have the last 18 years . Haven’t suffered any real side effects, bit grumpy , feel very upset as felt like this was the last route to take as had enough of this condition