Which one of the following patients should be LEAST worried that the BCP will be ineffective?
1) A patient who is taking a GnRH antagonist, which competes with GnRH for the GnRH receptor
2) A patient taking an anti-depressant drug, which early studies have shown might alter hormone levels
3) A patient who is taking a weight-loss prescription, which elevates her liver metabolism levels significantly
4) A patient with irritable bowel syndrome, who has been suffering from severe diarrhea frequently in the last month
