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 is one of a small number of industrial chemicals that is recognized as a known human carcinogen. Benzene is especially toxic to the blood-forming organs, i.e., the bone marrow and other organs that can produce blood cells.hat is Benzene? Benzene is the simplest aromatic hydrocarbon; it has 6 carbon atoms and 6 hydrogen atoms in a hexagonal (ring) structure. Discovered by the English scientist Michael Faraday in 1825, it was named benzene in 1845 by A.W. von Hofmann, the German chemist, who detected it in coal tar.