We have screened the complainants carefully so as to include only those whose symptoms we strongly feel have been brought on by the use of the drug

Mr Harvey says his 1,700 clients are of different age groups and were selected from about 4,000 people who contacted the firm with complaints about the drug. "We have screened the complainants carefully so as to include only those whose symptoms we strongly feel have been brought on by the use of the drug," he said.