Recommendations for Dandruff please

[needadviceprettyplease]

Hi, just looking for advice to treat my 15 year old's Dandruff please.
We've tried head and shoulders and some random shampoo from Home Bargains but it's still there. Can anyone recommend something that's worked for them / their child? I'll pop to the pharmacy later for a chat but it's good to have recommendations.
Thankyou in advance.

Nizoral is good and doesn't have the "interesting" smell of TGel, they've are both effective.

Edit, just noticed these are over 12s only. But pharmacist may have a recommendation

Hi there, I was advised Nizoral by my GP, it does work, very small bottles though so may need a couple. Also Nioxin more expensive but good as a maintenance once every couple of weeks.

Fab thanks guys. I knew I could rely on mumsnet!