Malathion and head lice
Michael Gochfeld
gochfeld at eohsi.rutgers.edu
Sun Jun 24 06:35:07 EDT 2001
I realize that head lice are not butterflies, and the use of malathion
to treat head lice will not have an impact on butterflies (there is also
some controversy over its efficacy for head lice).
We use many substances as medications because they are toxic to the
target organism. This takes into account that medications have unwanted
and in some cases dangerous side effects.
For example, many of the most unpleasant side effects of oral
antibiotics stem from their impact on non-target organisms in the
intestine.
The use of malathion for head lice is itself controversial and many side
side effects, some serious have been attributed (with varying levels of
confidence) to its use. It is used only for a condition that is itself
quite serious and difficult to treat. Its safety is only relative to
the seriousness of the condition.
The analogy between safety for medical use and for general application
is not great since the attorney (Snell and Wilner) for Medicis (the
manufacturer of Ovide) acknowledges in a letter apparently threatening
libel action against an anti-head lice organization
"As you clearly know, medical studies and tests have been conducted
concerning the industrial grade use of malathion, which conclude
inappropriate use of the pesticidal spray malathion may have toxic
side-effects. The industrial grade of malathion contains many
impurities which have been associated with reported side-effects."
This is from the text of a letter signed Snell and Wilner. Like most
things posted on the internet, one must use caution in believing what
one reads.
M. Gochfeld
--
Michael Gochfeld MD, PhD
Professor of Environmental and Community Medicine
UMDNJ-Robert Wood Johnson Medical School
EOHSI Building---170 Frelinghuysen Road
Piscataway, NJ 08854 USA
Phone 732-445-0123 x627 fax 732-445-0130
"gochfeld at eohsi.rutgers.edu"
------------------------------------------------------------
For subscription and related information about LEPS-L visit:
http://www.peabody.yale.edu/other/lepsl
More information about the Leps-l
mailing list