If I take two 50mg Viagra instead of one 100mg Viagra, does it have the same effect?

I take a blue warfarin tablet 3 mg and want to no is this why I can't get a erection I have bought 50mg sildenafil from chemist which they say is viagra any more suggestions as they don't do anything. th

Myint; My good friend masso has answer perfectly. But I would like to have you try just the one pill of the 50mg many guys get by just as well on the 50mg as they do on the 100mg, And if it does not work you have nothing to lose just take the other 50mg you will be fine.

Yes , 50mg plus 50mg is a 100mg, the same as taking one 100mg. pill, therefore same effect.