I have been prescribed morphine patches (Butrans 10mg) just over 3 weeks ago, I'm now on my 4th weekly patch. For the first two weeks I had no side effects. But for the last ten days I've been vomiting continually. I have a high temp slot if the time also and sweating abnormally. I've been prescribed anti sickness tablets also but I'm not getting any relief. How long should I put up with the sickness. I'm very weak and drained and don't know what to do for the best. Any advice would be appreciated.