July 23, 2016

Pyrethrum

font size


What other names is Pyrethrum known by?

Chrysanthème Insecticide, Chrysanthemum cinerariifolium, Dalmation Insect Flowers, Dalmation Pellitory, Pelitre, Piretro, Pyrèthre, Pyrèthre de Dalmatie, Pyrethrum cinerariifolium, Tanacetum cinerariifolium.

What is Pyrethrum?

Pyrethrum is a plant (Chrysanthemum cinerariifolium). Pyrethrum is also the name of the crude extract obtained from flowers of this plant.

Be careful not to confuse pyrethrum with pyrethrin. Pyrethrin refers to a more refined extract of pyrethrum. Pyrethrin is in body lice medicines such as A-200 Pyrinate, Barc, Lice-Enz, Licetrol, Pronto, R and C, RID, Tisit, Tisit Blue, and Triple X.

People apply pyrethrum directly to the skin as an insecticide, particularly for head lice, crab lice and their nits, and mites (scabies).

Effective for...

  • Head lice and crab lice. Applying pyrethrins to the skin in concentrations of 0.17% to 0.33% for 12-24 hours is effective for treating head lice and crab lice. Pyrethrins are usually combined with piperonyl butoxide (2% to 4%) to increase effectiveness.

Ineffective for...

  • Scabies (mites).
More evidence is needed to rate the effectiveness of pyrethrum for these uses.

Insufficient Evidence to Rate Effectiveness for...

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).


Therapeutic Research Faculty copyright

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


Parenting and Pregnancy

Get tips for baby and you.

Related Drugs
Health Resources
Related Supplements
advertisement
advertisement
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations