I personally use nolva and prefer it over clomid. And tamox is rarely counterfeited but that's not saying fakes aren't out there. If you can get your hands on it, go with pharma grade tabs rather than "research chem" liquid versions. I think you have a much better chance of getting the real deal with HG tabs vs. research chems. There are easily accessible legit tamox tabs floating around out there, like Tamoxigen and Femoxtal.