The red tonic was not quite as effective as the ichor, but it provided him enough relief from his pain and wounds as they began to heal. It'd take time, however. 
Continuing on from the square chamber, he could hear that sound again, the whistling and the metal clunking. As he entered into another square chamber, he could see a corridor leading off to the right, where the sound was coming from. There was also a door directly in front of him. The path he'd take was his to choose.