I distrust medicine much more than anybody I know. However, our pediatrician scared us into having my kid go through an MRI for a "possibly serious condition" when he was a few months old. Naturally nothing was wrong.
Now he is seven years old... and by fucking golly his memory is scarily good in all situations. My memory is better than at least 99% of adults I meet. The kid puts me to shame. Not only can he easily best me at any memory type of game, his episodic memory is incredible. He'll remember I promised we would do something, recalling every pertinent detail to make sure I adhere to it. He remembers who gave him what toy on which day (I used to remember that stuff when I was a kid). He recalls details of classroom events down to exact phrases.
What I'm trying to say is, as much as I hate medicine in general, I think this is one place at least my kid didn't get messed up by it.