For serm? It's all preference. I like Clomid but it more my vision a little blurry for last 2 weeks and a better libido booster than tamoxifen. But tamoxifen helps a little more if I have gyno. But if I buy tamoxifen I'll stack with DAA cuz it getsy stuff workin better than anything. But if u have the money, everyone prefers torem. I never used it cuz I just don't have the money and tamoxifen and Clomid work great. Also get some letrozole incase rebound gyno but letro needs to be dosed a certain way or u get nasty rebound gyno