Clioquinol Mr. Pavitt asked the Secretary of State for Social Services if, in view of the widespread hazards of clioquinol, as exemplified by the information sent to him by the hon. Member for Brent, South, he will request the appropriate Section 4 Committee to review without delay the efficacy of this drug for the prevention and treatment of travellers' diarrhoea, and to make recommendations. Mr. Moyle The Committee on Safety of Medicines continually monitors all marketed drugs, and are aware of the article in the Lancet of 28th May, to which my hon. Friend has drawn my attention. I am informed that the Committee is at present reviewing the safety and efficacy of clioquinol for the prevention and treatment of travellers' diarrhoea.