To me this song seems to be referring to disappointing someone he loves. He doesn't know what to say, but he is tring to fix it and patch the relationship up. He is surrendering and giving himself to (her) and is asking her to let go of the past and move forward with him. When he says she's got the antidote it's like saying its up to her now to let go of the past and continue forward with him (into the afterlife).
To me this song seems to be referring to disappointing someone he loves. He doesn't know what to say, but he is tring to fix it and patch the relationship up. He is surrendering and giving himself to (her) and is asking her to let go of the past and move forward with him. When he says she's got the antidote it's like saying its up to her now to let go of the past and continue forward with him (into the afterlife).