Hi Lambo! Welcome to the boards! I'm sure you will find LOTS of info here. Let me introduce you to a few of the places to start your quest for knowledge --
1) WarLobo's sticky at the top of this board
2) the Search button - type in "clen" & "birth control" and you will probably find lots of answers to this question - its come up many times.
In general I don't believe there is any interaction. But run the search for more detail.
Tell us about yourself! What are your current stats and goals? Looking forward to more posts from ya!