Survivor since 2014
A bit of queasiness in the beginning prompted me to switch to night time for taking Tamoxifen. As the hot flashes and leg cramps led to frequent insomnia, I tried switching back to morning, but found my bedtime routine was more consistent than my mornings, so I've stuck with taking the medication at night. I heard somewhere that just the simple act of taking a pill at night can help you relax and sleep better, even if it's not actually medicine. Your doctor or pharmacist can help you decide which is best for you.