Pubdate: 10 Dec 1998 Source: Tucson Citizen Copyright: 1998 Tucson Citizen Contact: (520) 573-4569 Website: http://www.tucsoncitizen.com/ Author: Ronald R. Watson Letters To The Editor MARIJUANA SUPPRESSES HEALTH Marijuana is addictive and very toxic. When physicians go outside their area of expertise and research, they frequently make mistakes. Thus Dr. Andrew Weil, who has contributed so much to the wise use of plants in medicine, was dead wrong when he said that marijuana is "one of the safest drugs known to medicine." More than a decade ago my research lab found that the addictive component of marijuana, THC, suppressed the human immune system required for optimum cancer and disease resistance. Ten years ago, we reviewed the multitude of research papers showing that THC was immunosuppressive, more so than tobacco. Since then the volume of data and studies have expanded understanding of marijuana's many properties which suppress health. Not unexpectedly many researchers have found that regular smoking of marijuana, like tobacco smoke, by humans and animals greatly increases lung disease and oral cancer. Marijuana smoking is no more dangerous than tobacco. But tobacco kills 500,000 Americans a year. How can it be a "safe drug?" Happily federal restrictions have kept the regular use of marijuana down, saving thousands of lives. Daily exposure to environmental, tobacco or marijuana smoke similarly cause many lung and systemic medical problems. The Citizen could do a service to the Tucson public by interviewing local marijuana researchers on its toxic properties. Ronald R. Watson Professor of public health research Arizona Prevention Center - --- Checked-by: Richard Lake