I have been skimming around online to find out if gas and bloating is a side effect of Wellbutrin XL and have come across several comments pertaining to the generic version of the drug causing more of the negative side effects than the brand name version. I was on the drug years ago and did not have this problem. I am 1 week on and have major gas and bloating. I called the pharmacist and he said he "didn't think there was a generic version" hmmm... shouldn't he know these things? Anyway, my pills have a pink WXL 150 stamp. Any input?