Do you have any citation for that? I'm pretty sure doctors are trained to look after different races and both genders. Looking after women's specific biology is its own entire field.
http://freakonomics.com/podcast/bad-medicine-part-2-drug-tri...
Race wouldn't really play a part here I don't think unless a medicine happened to effect a race differently (e.g. African people often have sickle-cell anemia, so you do have to consider race sometimes as well).
But the user above actually said something differently, in that people are treated differently. Like I said, doctors are trained to treat everybody regardless of race/ gender. Clinical trials based on variables of participants, and the general treatment of individuals is completely different.