The US FDA has assigned the pregnancy category B status to Benadryl, which means that it is considered safe to use, as there are no known side effects. However, your doctor will be the best person to judge whether or not you should take Benadryl while you are pregnant. He will also decide on the quantity of intake.
Human carcinogen -- Benzene: Benzene is a chemical deemed to be carcinogenic to humans. The carcinogenicity of the substance may be influenced by the nature (e.g. inhalation, ingestion, skin contact), duration and level of exposure. Benzene exposure is associated mainly with an increased risk of developing leukemia or lymphoma.
Benzene. Benzene is a dangerous chemical that is found both in natural forms and as a petroleum by-product. Known to cause cancer, Benzene is a clear liquid with a sweet smell. It is one of the chemicals that have been found in the fracking fluids used in hydraulic fracturing.Benzene is a major contributor to water contamination from fracking. It can have fatal effects on people that are exposed to Benzene for long periods of time and at high levels.t is one of the chemicals that have been found in the fracking fluids used in hydraulic fracturing. Benzene is a major contributor to water contamination from fracking. It can have fatal effects on people that are exposed to Benzene for long periods of time and at high levels.