Last week, United States President Barack Obama chaired a meeting of seven of the 11 countries in Cambodia on the sidelines of the East Asia Summit, where they set themselves a deadline of October next year to conclude the TPP.
Mr Key said yesterday that meeting would add momentum to the Auckland talks.
"Everyone has to benefit a little bit, but if we had to give away Pharmac, that wouldn't work for New Zealand either."
The US is seeking greater transparency in Pharmac's decision-making. Other sticking points are intellectual property provisions, agriculture, and state-owned enterprises.
Mr Key said President Obama was "deadly serious" about getting the deal concluded.