Lyric discussion by FloydHammer 

Cover art for Maria lyrics by Rage Against the Machine

the line

'my job is to kill if you forget to take your pill"

does not refer to this song. the thing about birth control pills may be true, but its not what that metaphor means. the metaphor is also seen in Sleep Now In The Fire. the line is

'for its the end of history its caged and frozen still there is no other pill to take so swallow the one that makes you ill'

the pill refers to your life, the way of life. so swallow the pill means accept the life that your corporate masters have made for you. thats what the guy is shouting in the song, he wants Maria to conform to her slavery. most of the lines in the song are representative of something.