As the House will be aware, it would require legislation to ban the prescribing of any particular preparation by reason of the provision of the National Health Service Act, which simply provides for the supply of proper and sufficient drugs and medicine. On the question of the cost of prescriptions, as I have already told the hon. Gentleman the Member for Newcastle-upon-Tyne, East (Mr. Blenkinsop), the Hinchliffe Committee is considering this at the present time. Meanwhile, there is a voluntary price agreement of which the right hon. Lady may know, and there are, of course, the Prescriber's Notes, which are sent to all National Health Service doctors and should be helpful to them.