I was diagnosed with Stage 1 breast cancer just before Christmas and had a lumpectomy and removal of 2 lymph nodes, which are clear, at the beginning of January. I recovered really well but went I started taking Tamoxifen after 2 weeks I experienced depleted energy, sick and dizzy, horrendous hot sweats day and night when I dripped with sweat and itching in my armpit and painful operation site. I felt so unwell I stopped taking the Tamoxifen and within 2 days felt 'normal'. However, I rang my surgery and they said I had to take them and prescribed 37.5mg Venlafaxine which is an antidepressant but is supposed to help with side effects. I'm coping so far but I reach the two week mark later this week and am worried I won't be able to cope with the return of the previous symptoms. I feel very tired and lethargic but not sure if it's the Tamoxifen or Venlafaxine. I see the oncologist later this week, so will find out if I need radiotherapy. Any advice would be gratefully received!