Got this resopnse from the lovely nurses on here about flying .....
There is no agreed guidance about the need to stop Tamoxifen before a long haul flight. We know that tamoxifen can increase the risk of developing blood clots. People taking tamoxifen might need to take extra precautions to reduce the risk of this developing over and above the general advice given to travellers. But the advice doctors give their patients seems to vary as you found from looking at the forum.
It’s not clear if having a short break from Tamoxifen is unsafe but oncologists do sometimes advise this for people having troublesome side effects to see if things improve. There is no reliable evidence to indicate if this is harmful. A study is currently underway to look at the safety of women interrupting hormone treatment for two years to try to get pregnant but it may be ten years or more before this reports.
As you say you are due to have four long haul flights over the next nine months so it’s understandable that you have concerns. As your situation is unusual, it would be best to contact your oncologist to discuss this further. This would also give you an opportunity to understand why they have adopted this specific recommendation at your unit.
