T gel therapeutic shampoo treats your scalp cares for your hair what the medicine is for neutrogena tgel therapeutic shampoo is a fragranced medicated shampoo which should be used two or three times a week for the treatment of itchy flaky scalp disorders such as dandruff psoriases and seborrhoeic dermatitis regular use helps control these problems while leaving your hair shiny and manageable this shampoo can be used by adults and children aged 12 years and over