Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.
Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.
Malathion has not been adequately evaluated in
pregnant women. Available data
from animals suggests that the risk of fetal toxicity is low. It should be used
during pregnancy only if clearly needed.
It is not known whether malathion is excreted in
Malathion should be stored at room temperature, 20 C - 25 C (68 F -
77 F). It is flammable and should be kept away from heat and open flame.
Dry hair and scalp should be thoroughly wet with malathion lotion,
including the back of the head and neck. The hands should be washed after
The hair should not be covered and should dry naturally without using an
electric heat source.
The hair should be shampooed after 8 to 12 hours, rinsed and combed with a
fine - toothed (nit) comb to remove dead lice and eggs.
Malathion lotion should be applied again if lice are still present after 7
- 9 days.
DRUG CLASS AND MECHANISM:
Malathion is a pesticide used for killing head lice (Pediculus humanus
capitis). It kills head lice and lice eggs by blocking the activity of enzymes
(cholinesterase) that breaks-down and inactivates acetylcholine (a
neurotransmitter) in head lice. This causes high levels of acetylcholine which
leads to death of lice.