I got these chords from watching the MTV Unplugged in New York DVD, and I thought I'd 
tab them for you since all the other acoustic versions are (i'm sorry to say this) wrong.

When you get to the bridge/chorus, all the chords are barred, so you go from a regular G 
to a barred G, which may sound a little off the first few times you play it, but I can 
assure you that this is how Kurt Cobain does it in the show...so enjoy!

Am (x02210@1)                GI'm (320003@1)on my time with everyone
Am (x02210@1)            GI (320003@1)have very bad posture

G (320003@1)     A (x02220@1)              BbSit (x1333x@1)and drink Pennyroyal Tea
G (320003@1)         A (x02220@1)                   BbDistill (x1333x@1)the life that's inside of me
G (320003@1)           A (x02220@1)        BbSit (x1333x@1)and drink Pennyroyal Tea
G (320003@1)   A (x02220@1)       BbI'm (x1333x@1)anemic royalty

Am (x02210@1)                    GGive (320003@1)me a Leonard Cohen afterworld
Am (x02210@1)            GSo (320003@1)I can sigh eternally

G (320003@1)    A (x02220@1)           BbI'm (x1333x@1)so tired I can't sleep
G (320003@1)   A (x02220@1)        BbI'm (x1333x@1)a liar and a thief
G (320003@1)     A (x02220@1)              BbSit (x1333x@1)and drink pennyroyal tea
G (320003@1)   A (x02220@1)       BbI'm (x1333x@1)anemic royalty

Am (x02210@1)                 GI'm (320003@1)on warm milk and laxatives
Am (x02210@1)               GCherry-flavored (320003@1)antacids

G (320003@1)     A (x02220@1)              BbSit (x1333x@1)and drink Pennyroyal Tea
G (320003@1)         A (x02220@1)                   BbDistill (x1333x@1)the life that's inside of me
G (320003@1)     A (x02220@1)              BbSit (x1333x@1)and drink Pennyroyal Tea
G (320003@1)   A (x02220@1)       BbI'm (x1333x@1)anemic royalty