Tamoxifen

I have been taking for the past 2 and a half years  Tamoxifen 
I was first prescribed 
GenRx in a bottle 
then a year ago
I was given Tamoxifen Sandoz in a box
went to the Chemist and was told both are out of stock and has been for several months 
the chemist has prescribed me
Nolvadex D and the price has increased by 4.00 the government has put a surcharge on pills
has any one taken Nolvadex D l?
Stork