I second the Nilstat. I also found with DD that if she sometimes vomited when she had it so I gave it to her before a feed so she didn't bring the milk up. I have used it on DS now very recently and he has had no prob with it at all. I find it best to put drops on my (clean) finger and wipe it around his gums rather than syringe the 1ml down his throat as it needs to touch the thrush. And yes, your nipples too!