Hi Sandra,
According to info. given to me by a doctor..."Any antidandruff shampoo containing selenium should work, but be careful not to get it into the baby's eyes. Typically you'll need to use it daily for 3 days and then twice a week or so until it clears up, then you could go back to regular shampoo."
We just used a generic brand. I used it on my daughter when she was 3 months. I actually didn't need to use it as long as it was recommended to clear it all up, but then I had a reoccurance later...used it again and now it's gone.
Other advice that I was given.."If the scalp is very crusty, put some baby oil or olive oil on the scalp 1 hour before washing to soften the crust. Wash all the oil off, however, or it may worsen the cradle cap.
If it's red and irriated, apply 1% hydrocortisone cream three times a day for 7 days."
Hope that helps!
Lindzebird