Alfalfa - Humira (Adalimumab) Interaction
Herbal: Alfalfa
Also Known As: Medicago sativa, Feuille de Luzerne, Grand Trèfle, Herbe aux Bisons, Herbe à Vaches, Lucerne, Luzerne, Medicago, Phytoestrogen, Phyto-oestrogène, Purple Medick, Sanfoin
Drug: Adalimumab
Brand names:
Humira

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 18, 2025
Interaction Details
Adalimumab is classified as belonging to the following category: Immunosuppressants
Theoretically, alfalfa might decrease the efficacy of immunosuppressive therapy.
In vitro research and human case reports suggest that alfalfa may have immunostimulant effects.
Interaction Rating
Likelihood of Occurrence
PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
References
- Light TD, Light JA. Acute renal transplant rejection possibly related to herbal medications. Am J Transplant 2003;3:1608-9.
- Prete PE. The mechanism of action of L-canavanine in inducing autoimmune phenomena. Arthritis Rheum 1985;28:1198-200.
- Alcocer-Varela J, Iglesias A, Llorente L, Alarcon-Segovia D. Effects of L-canavanine on T cells may explain the induction of systemic lupus erythematosus by alfalfa. Arthritis Rheum 1985;28:52-7.
Alfalfa Overview

Adalimumab Overview
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Adalimumab injection products are used alone or with other medications to relieve the symptoms of certain autoimmune disorders (conditions in which the immune system attacks healthy parts of the body and causes pain, swelling, and damage) including the following:
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rheumatoid arthritis (a condition in which the body attacks its own joints, causing pain, swelling, and loss of function) in adults,
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juvenile idiopathic arthritis (JIA; a condition that affects children in which the body attacks its own joints, causing pain, swelling, loss of function, and delays in growth and development) in children 2 years of age and older,
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Crohn's disease (a condition in which the body attacks the lining of the digestive tract, causing pain, diarrhea, weight loss, and fever) that has not improved when treated with other medications in adults and children 6 years of age and older,
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ulcerative colitis (a condition which causes swelling and sores in the lining of the colon [large intestine] and rectum) when other medications and treatments did not help or could not be tolerated in adults and children 5 years of age and older,
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ankylosing spondylitis (a condition in which the body attacks the joints of the spine and other areas causing pain and joint damage) in adults,
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psoriatic arthritis (a condition that causes joint pain and swelling and scales on the skin) in adults,
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hidradenitis suppurativa (a skin disease that causes pimple-like bumps in the armpits, groin, and anal area) in adults and children 12 years of age and older,
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uveitis (swelling and inflammation of different areas of the eye) in adults and children 2 years of age and older,
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chronic plaque psoriasis (a skin disease in which red, scaly patches form on some areas of the body) in adults.
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Adalimumab injection products are in a class of medications called tumor necrosis factor (TNF) inhibitors. They work by blocking the action of TNF, a substance in the body that causes inflammation.
Alfalfa - More Interactions
Alfalfa interacts with 570 drugs
Interaction Rating Key
These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.
Major | The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur. |
Moderate | Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur. |
Minor | Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction. |
Unknown | No interactions have been reported or no interaction data is currently available. |
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Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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Drug descriptions are provided by MedlinePlus.