U.S. Trade Representative Jamieson Greer made clear in a meeting with Irish Trade Minster Simon Harris last month that Washington was open to "creative solutions" on pharmaceutical trade between the U.S. and European Union, Harris said on Wednesday.

"He made it clear that he was open to creative solutions when it comes to pharma and I think that's an important recognition that actually pharma between the U.S. and the EU, the U.S. and Ireland, is much more interdependent than perhaps people were led to believe in certain quarters at the start of this process," Harris told reporters.

Harris added that there was a welcome intensity to the talks between the EU and U.S. and that while a 10% tariff clearly seems to be the baseline in any agreement the U.S. has reached so far, Brussels will be seeking zero-for-zero tariffs in as many sectors as possible.