Can Tamoxifen cause false negative Pregnancy Test Result
I'm hoping someone out there might be able to help me - I'm just wondering if it's possible that tamoxifen can cause false negatives for over the counter pregnancy test kits.
I'm 38 and have been on Tamoxifen for four and a half years. I was diagnosed 5 years ago with fairly advanced (metastasised) breast cancer and had to have 6 months of chemo followed by radical mastectomy and auxillary clearance, followed by concurrent milder chemo and 8 wks of radiation and finished treatment 11 months later. My periods stopped after the third month of chemo and have never come back. I did initially go into menopause from the chemo but about a year after I'd finished the chemo I had hormone tests which showed I was no longer menopausal and was ovulating and had a cycle. Until recently, I wasn't remotely worried about getting pregnant as I have not had a period in years. However in the past month I have been a little worried I might be pregnant (ridiculous I know - I feel stupid even writing it down when I've had no periods for 5 YEARS!), with symptoms of weight gain, tiredness, and very mild nausea, so I did a pregnancy test and it was negative. But I would like to know if the fact that tamoxifen is a hormone drug, means it could interfere with a pregnancy test? Does anyone know of any such cases. I started looking up websites this evening and now feel sick reading all the side affects to a baby if you take tamoxifen while pregnant. I know I'm being totally paranoid but if anyone has any information on this I would really appreciate it.
Thanks a mill!