[Verse 1]
Side effects include
A rapid change in mood
A lousy attitude
And recurring dreams of you

[Chorus]
These side effects
Are messing with my head
These side effects
Are messing with my head

[Verse 2]
Lack of sleep and eating
Erratic heart beating
Losing and retreating
And it seems to just keep repeating

[Chorus]
These side effects
Are messing with my head
These side effects
Are messing with my head

[Post-Chorus]
Ooh-ooh-ooh, ooh-ooh
Ooh-ooh-ooh, ooh-ooh
Ooh-ooh-ooh
Ooh-ooh-ooh, ooh-ooh-ooh