Lyric discussion by solent 

I feel the people who are putting a physical interpretation on this song are being far too literal.

If you have ever suffered severe depression you will know that it not only affects you mentally, but physically too. You get tired, your limbs feel lifeless, like you don't have the energy to move them. You feel broken. You can literally feel the depression in your bones.

"Now I can't climb the stairs" refers to the struggle to climb out of the depression.

"Pieces missing everywhere/Prozac painkillers" is obviously the anti-depressants which numb the pain but leave you emotionally lifeless.

And "And I used to fly like Peter Pan/All the children flew when I touched their hands" refers to the times before the depression when (at least looking back) it felt like anything and everything was possible.

I agree completely. I also believe that the line " I used to fly like Peter Pan" refers to happy thoughts... Realting to not being depressed

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