The potion is still working its way through Teren's system when she notices that someone is entering the cell, and instinctively jolts upward because that's the opposite of what she wants. Her dagger is out and held at the ready, her eyes narrow and every damaged muscle poised to ruin the shit out of anyone who tries to mess with the cell's other two occupants.
But then Nate just kind of walks right by her, and she recognizes that it's him, and realizes she feels like garbage, and sinks back down to rest on one elbow. Breathing as deeply as she can, she angles her head to see Alistair behind her, and notes that he looks no worse for wear. Perhaps they'll be all right.