Medicine: Valium Alarm

Does it promote cancer?

To cope with anxiety and tension, millions of people reach for a Valium, a tranquilizer that has become the U.S.'s most widely prescribed drug. Now comes a report guaranteed to make users of the drug anything but tranquil. According to a Canadian physiologist, Valium may promote the growth and spread of cancer.

Dr. David Horrobin's disturbing suggestion, presented last week in Toronto at the annual meeting of the American Association for the Advancement of Science, is primarily based on his and others' studies with tissue cultures and laboratory rats. In one experiment, Horrobin injected breast tumors into 20 cancer-free...

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