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Welcome to Consultox, Limited, a toxicology consulting firm established in 1985. Dr. Richard A. Parent, Principal and Consulting Toxicologist, is a doubly Board Certified Toxicologist with a firm foundation in chemistry and over 30 years of practice in the field of Toxicology. Consultox is a full service toxicology consulting firm providing support to litigants as an Expert Witness in Toxicology and to industry as an Independent Toxicology Consultant for projects involving product safety, drug impurities, risk assessment, and various agency product registration processes.

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Expert Witness Toxicologist

Richard A. Parent, PhD, DABT, FATS, RAC, ERT, is certified by the American Board of Toxicology and the Academy of Toxicological Sciences as well as the Regulatory Affairs Certification Board. He is a recognized Expert in Toxicology in France and the European Community. Dr. Parent has over 35 years of experience in Toxicology and Chemistry and has directed two toxicology laboratories, the combination of such affords him insights that go far beyond his fields of dual expertise. Read More

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The Animas River Is Dead - Heavy Metals
A strong statement, but not so far fetched when you consider that the River is contaminated with cadmium (probably responsible for its yellow color), lead, arsenic, beryllium, copper, aluminum, and mercury at concentrations that exceed the EPAs own safe maximum contamination levels.

The Animas River is Dead - Health Effects
Still a strong statement but note that the levels being measured in the water at this time present an immediate health problem for those using the water source for drinking and irrigating crops. Animals will also be affected. Most effects of heavy metals are not immediately experienced, but many of them result from the accumulation of heavy metals in the body which may produce chronic effects including kidney damage, central nervous system damage particularly in young people and newborns, and, indeed, cancer, among other effects. In essence, the Animas River is dead to those who seek to use it to survive.

The Animas River is Dead - No Practical Solution
While the river may be cleansed as some of the soluble metal salts are washed downstream into New Mexico and Utah, it is truly what is left behind that guarantees that the Animas is dead. When the EPA breached the dam holding back the 3 million gallons of contamination from the gold mine, the release obviously contained both soluble salts of heavy metals (measured by the EPA on August 5th and 6th,) but also the more long lasting "insoluble" salts and heavy metals. These insoluble salts will settle to the bottom of the River mixing with silt and other organic matter. There is no practical manner to remove these sediments, unless the entire Animas River is dredged. Even then, the disruption of the silt bed will send more heavy metal sludge further downstream.

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Dr. Richard A. Parent has given testimony in courts in the United States and Canada nearly 30 times, and he has been deposed over 120 in support of both plaintiff and defense. Cases cover a wide range of subjects: dramshop, diacetyl (popcorn lung), wrongful death related to methadone and carbon monoxide, personal injury involving ozone, carbon monoxide, benzene, sulfur dioxide, chlorine, 1,4-dioxane, alcohol, arsenic, and others. Dr. Parent has lectured on the requirements for the establishment of causation and the structuring of expert reports. Many redacted reports are included on this website for review. Read More


Dr. Richard Parent has assisted clients in areas of product safety relating to toys, cosmetics, household products, pesticides, OTC drugs, art supplies, and food additives (GRAS).  He has worked with appropriate agencies to meet requirements for labeling and warnings as well as creating material safety data sheets (MSDS) for various industrial products.  He has been involved in assessing risk in occupational situations where potentially hazardous substances are involved and preparing submissions in support of food additives in accordance with the GRAS procedures.  Of particular interest is Dr. Parent’s area of specialization in Inhalation Toxicology and his significant contribution to the field through the publication of his book, “Comparative Biology of the Normal Lung”, a well respected source of normal parameters related to lungs of various animal species, including man.

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