(5) A surgical dressing that is described as conforming to a monograph in a specified publication shall conform to the description and tests set out in that publication for that surgical dressing. (6) A medical device that is described as conforming to a particular description shall conform to that description. 5 Pharmacist may dilute medicine in particular case Where any liquid medicine in respect of which a standard is prescribed by any of the provisions of these regulations is to be supplied by a pharmacist pursuant to a prescription issued for a particular patient, the pharmacist may add a compatible diluent to the medicine if he is satisfied that --  (a) such dilution is necessary to adjust the dose to a quantity easily measurable by the patient or by any other person on behalf of the patient; and (b) the addition of that diluent will not affect injuriously the composition of the medicine. 6 Colouring substances Part 3 Advertisements 7 Advertisements not to claim official approval No advertisement relating to any medicine, related product, or medical device shall contain a statement to the effect that an advisory or technical committee established under section 8 of the Act, or any member of such a committee, or any officer in the service of the Government, has approved, or has refrained from disapproving, the advertisement or any of the claims or statements made in it. 8 Advertisements for medicines (1) Every advertisement for a prescription medicine must include --  (a) the words "