According to the internet, Tamoxifen can cause insomnia. I haven’t slept through the night since about a week after I started taking it. I’ve been up since around three. It’s four now. I bet I’m up for another hour at least. This has been the trend these last few weeks. I keep hearing Dave’s clock chime the night away. I guess I’m calling my onc tomorrow and asking for sleeping pills. Just what I need…one more pill to take.