I have been on Tamoxifen for 8 years now and definitely have noticed some bruising. I asked about that at my yearly check up at Mayo and was told it could be a side effect of Tamoxifen. I was 62 when I started taking it. Bruising not real bad just superficial on tops of my hands or arms if I work in yard a lot etc. And age could be a factor now too but my husband is eleven years older than me and his bruising is much worse and he definitely not on Tamoxifen lol Other than that I would not even know I take it. No other side effects.