In the _Journal of the National Cancer Institute_, May 18, 1994 issue,
researchers at the Manitoba Institute for Cell Biology in Winniped,
reported that cancer tumors grew faster and larger in mice injected with
the common anti-allergy drugs loratadine, astemizole, and hydroxyzine.
The FDA stated that they were concerned over this finding, but would not
stop people from using antihistamines.  Homeopaths have known for years
that antihistamines are one of the classes of drugs that produce
dysregulation systemically, and are not at all surprised to see that the
dysregulation can extend to the genome.