Reviewed on 6/11/2021
Other Name(s):

Bracteate Lousewort, Bracted Lousewort, Bracted Pedicularis, Common Lousewort, Dwarf Lousewort, Early Lousewort, Pedicularis bracteosa, Pedicularis canadensis, Pedicularis centranthera, Pedicularis gracilis, Pedicularis longiflora, Pedicularis siphonantha, Pinyon-Juniper Lousewort, Wood Betony.


Lousewort is a group of plants. The leaves are used to make medicine.

People take lousewort by mouth to invigorate and strengthen the heart.

How does it work?

Lousewort contains chemicals that might work as antioxidants.


Next to red peppers, you can get the most vitamin C from ________________. See Answer

Uses & Effectiveness

Insufficient Evidence to Rate Effectiveness for...

  • To strengthen the heart.
  • Other conditions.
More evidence is needed to rate the effectiveness of lousewort for these uses.

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).

Side Effects

It isn't known if lousewort is safe or what the possible side effects might be.


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Special Precautions & Warnings

Pregnancy and breast-feeding: Not enough is known about the use of lousewort during pregnancy and breast-feeding. Stay on the safe side and avoid use.

Iron-deficiency anemia: Lousewort contains chemicals that bind to iron. In theory, this might reduce the amount of iron that the body absorbs from food and supplements.


The appropriate dose of lousewort depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for lousewort. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

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