depends on your previous scores, and this is the double edge of retaking mcats. If you scored say a 28 (10p 8v 10b) and decided to retake and scored a 31 (12p 7v 12b) although you improved your overall score, the admissions committee would get a glaringly good picture that your initial verbal score wasn't just a fluke. On the one hand, schools encourage you to get the best score, but I've heard that once you score anywhere near a 28-30 your chances of improving are drastically diminished. If your score is really low (i.e. < 26) I'd advise you to get into a good prep course and try again. Ideally, schools would like you to take it only once. Bare in mind, regardless if you score a 38, they'll always see your previous scores so it's up to you to determine wheter or not it's worth it to try another whack at it.