Stopped tamoxifen 1 week, after 5 days became very bloated in the lower small intestine area. still bloated now after 4 weeks, no appetite, lost 12lbs?

Look for a cause: I would suggest to check with your doctor, as the loss of weight and feeling of fullness might indicate another problem going on so please seek medical help. Unlikely caused by cessation of medications alone

Go see your doctor: Get a medical check up. It is not likely to be related to tamoxifen. make sure your cancer is under control. tamoxifen is a fairly harmless, well tolerated medicine. it is like taking a daily vitamin