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Colchicine

Colchicine reduces the inflammatory (swelling) response and pain in people with gout (high uric acid blood levels leading to painful accumulation of uric acid crystals in and around joints).

Interactions with Dietary Supplements

Vitamin B12
Colchicine may interfere with vitamin B12 in the body. Research is inconsistent. Both colchicine and vitamin B12 deficiency are reported to cause neuropathies (disorders of the nervous system), but it remains unclear whether neuropathies caused by colchicine could be due to vitamin B12 depletion.1 2

Nutrient malabsorption
Colchicine has been associated with impaired absorption of beta-carotene, fat, lactose (milk sugar), potassium, and sodium.3

Summary of Interactions for Colchicine

Depletion or interference Beta-carotene*
Potassium*
Vitamin B12*
Adverse interaction None known
Side effect reduction/prevention None known
Supportive interaction None known
Reduced drug absorption/bioavailability None known
Other (see text) Sodium

For the convenience of the reader, the information in the summary is categorized as follows: “Depletion or interference” indicates the drug may deplete or interfere with the absorption or function of the supplement or herb. “Adverse interaction” indicates that the supplement or herb used together with the drug may result in undesirable effects. “Side effect reduction/prevention” indicates the supplement or herb may reduce the likelihood and/or severity of a potential side effect caused by the drug. “Supportive interaction” indicates the supplement or herb may support or aid the function of the drug. “Reduced drug absorption/bioavailability” indicates that the supplement or herb may decrease the absorption and/or activity of the drug in the body. An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

References:

1. Palopoli JJ, Waxman J. Colchicine neuropathy or vitamin B12 deficiency neuropathy? N Engl J Med 1987;317:1290 [letter].

2. Kuncl RW et al. Colchicine neuropathy or vitamin B12 deficiency neuropathy? N Engl J Med 1987;317:1290–1 [letter].

3. Werbach MR. Foundations of Nutritional Medicine. Tarzana, CA: Third Line Press, 1997, 223–4 [review].