@Nannatash I was on Tamoxifen a while ago now... thinking early 08 was the last time I was on it. My side effects were mood related I felt like a was depressed all the time and very very grumpy. No joint or muscle pain. I still remember feeling sick for the first few weeks I started it bit nauseous but that went away. Things usually settle down you need to give your body time to adjust to taking this drug
all the best