First thing, it would be easy to criticize you about taking anything from a "friend of a friend". You know what I mean? But I won't.
Second. The description you gave was Vague, and your giving to many possible combinations of what is on the pill. Is it a round tablet? or capsule? Is the 'x0' on both sides? is the other side blank?
In reply to Gaijin, He may be right about the production costs of the pill itself. But, I highly doubt your " friend of a friend " is manufacturing these pills. If hes trying to make a quick buck he could easily slip you an aspirin and call it nolva.
There are no Certified or registered Nolva/Tamox Pills with an X0 or any of the combinations you gave. Could it be an imported Mexican version of Nolva? Sure why not.... Here in the US we do not supply anything you described for your nolva.
If I were you I wouldn't trust it. But, If You were me you would have gotten it from a source that was a little better researched.
My ultimate answer is --- Why be Sorry when you can still be "safe" ?? Do you want Gyno Or other sides? No. That, Is obviously why you did the cycle in the first place. To look good. Not to Look good and then have pea sized nuts and Moobs.
Do a little google research on getting nolva/tamox. There are pill and research grade liquids at disposal.
OH, and you might want to express ship that!