How long do hives last after discontinuing Zyban?

Hives are caused by an allergic reaction and as much as Zyban companies will have one believe, there are some terrible side effects taking this med. I had a friend who took it and his face was so swollen it cracked (as did his lips). The doctors at ER said it wasn't Zyban, but in truth it was. Go and see your doctor and if you don't have one then go to a clinic ASAP. You will be given a antihistamine. Don't self medicate yourself, but see your doctor! Good luck Hope you are feeling better soon Marcy