Can gemcitabine be substituted for taxotere (docetaxel)?

Gem for taxotere (docetaxel): Short answer is no. It cannot be substituted. Now depending upon the underlying cancer whether lung, breast, pancreatic or any other primary solid tumor, one can use taxol, Abraxane or Navelbine (vinorelbine) (they are taxanes like taxotere). If we want to move to a different agent altogether, then Gemzar or a no of other drugs would be available depending upon what the primary tumor is.