Answer:
Whoever makes it tells it not. Whoever takes it knows it not. Whoever knows it wants it not
I can be sweet or sour. I do not rhyme with any other word
I may be of the eye, in order I am pie. In my center there is a star, I keep medics where they are. What am I?
I am a million people's wakeup call, gossip party and adrenaline rush. What am I?
I sit in a corner while traveling around the world. What am I?
No matter how little or how much you use me, you change me every month.