I too have heard of problems regarding clots with J&J, not sure how serious it is or wide spread, but it is an issue. J&J has had other issues as a company recently and I am not sure they are trustworthy. I haven't heard of many people getting J&J around me so I am not sure I have any first hand knowledge, but England shut it down for a while as well as other countries. It appears to occur in only certain people, but haven't seen any more information recently on the issue.