Licopodio, Lycopode, Lycopode en Massue, Lycopodium, Lycopodium clavatum, Shen Jin Cao, Stags Horn, Vegetable Sulfur, Witch Meal, Wolfs Claw.


Overview Information

Club moss is an herb. People use the whole plant to make medicine.

Despite safety concerns, people use club moss for bladder and kidney disorders, and as a diuretic to increase urine.

Don’t confuse club moss with Chinese club moss. Only Chinese club moss contains huperzine A, a chemical which is thought to be helpful in dementia, memory loss, and myasthenia gravis.

How does it work?

There isn't enough information available to know how club moss works.


Uses & Effectiveness?

Insufficient Evidence for

More evidence is needed to rate the effectiveness of club moss for these uses.

Side Effects

Side Effects & Safety

Club moss is POSSIBLY UNSAFE when taken by mouth because it contains several poisonous chemicals. However, so far, no poisonings have been reported.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Club moss is POSSIBLY UNSAFE for anyone, including pregnant and breast-feeding women. Don’t use it.

Slow heart rate (bradycardia): Club moss might slow down the heart beat. This could be a problem in people who already have a slow heart rate.

Gastrointestinal tract blockage: Club moss might cause “congestion” in the intestines. This might cause problems in people who have a blockage in their intestines.

Ulcers: Club moss might increase secretions in the stomach and intestines. There is concern that this could worsen ulcers.

Lung conditions: Club moss might increase fluid secretions in the lung. There is concern that this could worsen lung conditions such as asthma or emphysema.

Seizures: There is concern that club moss might increase the risk of seizures.

Urinary tract obstruction: Club moss might increase secretions in the urinary tract. There is concern that this could worsen urinary obstruction.



We currently have no information for CLUB MOSS Interactions.



The appropriate dose of club moss 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 club moss. 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.

View References


  • Andersen, T. C., Jurgensen, G. W., and Christensen, E. Lycopodium spores in transrectal ultrasound-guided core biopsies of the prostate. Scand.J.Urol.Nephrol. 1998;32(2):148-149. View abstract.
  • Berkefeld, K. [A possibility for verifying condom use in sex offenses]. Arch Kriminol. 1993;192(1-2):37-42. View abstract.
  • Cullinan, P., Cannon, J., Sheril, D., and Newman, Taylor A. Asthma following occupational exposure to Lycopodium clavatum in condom manufacturers. Thorax 1993;48(7):774-775. View abstract.
  • Gebhardt, R. Antioxidative, antiproliferative and biochemical effects in HepG2 cells of a homeopathic remedy and its constituent plant tinctures tested separately or in combination. Arzneimittelforschung. 2003;53(12):823-830. View abstract.
  • Nakamura, S., Hirai, T., and Ueno, J. [Studies on bronchial asthma. 4. On occupational asthma considered to be caused by Lycopodium clavatum]. Arerugi 1969;18(4):258-262. View abstract.
  • Orhan, I., Kupeli, E., Sener, B., and Yesilada, E. Appraisal of anti-inflammatory potential of the clubmoss, Lycopodium clavatum L. J Ethnopharmacol 1-3-2007;109(1):146-150. View abstract.
  • Orhan, I., Terzioglu, S., and Sener, B. Alpha-onocerin: an acetylcholinesterase inhibitor from Lycopodium clavatum. Planta Med. 2003;69(3):265-267. View abstract.
  • Rollinger, J. M., Ewelt, J., Seger, C., Sturm, S., Ellmerer, E. P., and Stuppner, H. New insights into the acetylcholinesterase inhibitory activity of Lycopodium clavatum. Planta Med 2005;71(11):1040-1043. View abstract.
  • Felgenhauer N, Zilker T, Worek F, Eyer P. Intoxication with huperzine A, a potent anticholinesterase found in the fir club moss. J Toxicol Clin Toxicol 2000;38:803-8.. View abstract.

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
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