Hemlock water dropwort
Hemlock water dropwort


Hemlock water dropwort is a plant. The root is used to make medicine.

Be careful not to confuse hemlock water dropwort with similar sounding plants such as water hemlock and hemlock. Also be careful not to mistake the extremely poisonous hemlock water dropwort with other similar looking plants, such as wild parsnip, radish, sweet flag, or pignut.

Hemlock water dropwort is used for pimples, rashes, and other conditions, but there is no good scientific evidence to support these uses. Using hemlock water dropwort can also be unsafe.
When taken by mouth: Hemlock water dropwort is UNSAFE and poisonous. Swallowing even small amounts of root may cause death. Hemlock water dropwort contains a poison that might decrease nerve signals to the brain. Get medical attention immediately if hemlock water dropwort is taken by mouth. Signs of poisoning include nausea, dizziness, vomiting, blood in the urine, confusion, turning blue, convulsions, and unconsciousness.

When applied to the skin: There isn't enough reliable information to know if hemlock water dropwort is safe or what the side effects might be. But since it is known to be poisonous if accidentally swallowed, it is a dangerous substance to handle and use should be avoided.

Special Precautions & Warnings:

Hemlock water dropwort isn't safe for anyone to use. Some people are especially sensitive to the poisonous effects and should be especially careful to avoid use.

Pregnancy and breast-feeding: Hemlock water dropwort is UNSAFE and poisonous.

Children: Hemlock water dropwort is UNSAFE and poisonous. Keep children away from hemlock water dropwort. Children have been accidentally poisoned after eating the plant's roots.


NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
Likely ineffective Effectiveness definitions
Possibly ineffective Effectiveness definitions
Insufficient evidence Effectiveness definitions
  • Rash.
  • Pimples.
  • Other conditions.
More evidence is needed to rate the effectiveness of hemlock water dropwort for these uses.

Dosing & administration

The appropriate dose of hemlock water dropwort 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 hemlock water dropwort. 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.

Interactions with pharmaceuticals

It is not known if Hemlock Water Dropwort interacts with any medicines. Before taking Hemlock Water Dropwort, talk with your healthcare professional if you take any medications.

Interactions with herbs & supplements

There are no known interactions with herbs and supplements.

Interactions with foods

There are no known interactions with foods.


It is not known how hemlock water dropwort might work as a medicine.
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This monograph was last reviewed on 28/06/2022 18:46:06 and last updated on 11/11/2020 22:09:21. Monographs are reviewed and/or updated multiple times per month and at least once per year.
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