Fluoroquinolone Antibiotics
Common brand names: Ciprofloxacin (Cipro), Levofloxacin (Levaquin), Moxifloxacin (Avelox)
Three nutrients listed against this medication. The most severe is marked critical.
At a glance
One of the three is marked well documented. The other two carry their own evidence levels.
At a glance
- Gut Microbiome (Probiotics)Critical · Well documented
- MagnesiumModerate · Mechanism only, no human trial
- ZincModerate · Mechanism only, no human trial
Color shows how serious each listed effect is. The label beside it shows how strong the evidence is. The cards below explain each one and show its evidence.
Nutrients it can lower
Mechanism, Fluoroquinolones chelate divalent metal ions (Mg2+, Ca2+, Zn2+, Fe2+) in the gut. This is a well-documented pharmacokinetic interaction. The drug-mineral complex is poorly absorbed, depleting both the antibiotic and the minerals. Fluoroquinolone-associated disability (FQAD) may partly stem from severe magnesium depletion causing tendon damage.
Common signs, Tendon pain (especially Achilles), muscle cramps, fatigue, cardiac arrhythmia risk, neuropathy
Stahlmann et al. (Antimicrobial Agents and Chemotherapy, 1995; PMID PubMed ID: the permanent number the US National Library of Medicine gives a published paper. Each one links to that paper's record on PubMed. 8540708): magnesium deficiency produced joint cartilage lesions in juvenile rats identical to quinolone-induced arthropathy, which is the basis for the proposed link. Animal work. No human trial has measured a magnesium deficit caused by fluoroquinolone exposure.
Magnesium, calcium, zinc and iron reduce fluoroquinolone absorption and are kept at least 4 hours from the dose, which is established pharmacology. Where repletion follows the course, magnesium 400 mg/day for 4 to 8 weeks is a figure in common use and is not from a trial cited on this row.
Mechanism, Same chelation mechanism as magnesium, fluoroquinolones bind zinc in the gut, reducing both absorption of the antibiotic and zinc bioavailability The share of a dose that reaches the bloodstream in a form the body can use..
Common signs, Immune dysfunction, impaired healing, prolonged recovery post-infection
Zinc and fluoroquinolones chelate each other in the gut, and what that mainly reduces is absorption of the ANTIBIOTIC. Polk et al. (Antimicrobial Agents and Chemotherapy, 1989; PMID 2610494) ran a four-way crossover A trial design in which each participant receives both the treatment and the comparison, one after the other, and serves as their own control. in 12 healthy men and measured ciprofloxacin absorption; zinc status was never measured. The direction is nutrient-impairs-drug, and systemic zinc depletion by fluoroquinolones is not demonstrated.
Zinc is separated from fluoroquinolone dosing by at least 4 hours. Zinc 25 mg/day was used during and for 2 weeks after the antibiotic course.
Mechanism, Fluoroquinolones are broad-spectrum and cause significant microbiome disruption, they eliminate many commensal bacteria that produce short-chain fatty acids, B vitamins, and compete with C. difficile.
Common signs, Diarrhea, C. difficile infection risk, leaky gut, prolonged immune vulnerability
Dethlefsen et al. (PLoS Biol, 2008; PMID 19018661): ciprofloxacin, a fluoroquinolone, caused pervasive disruption of the human gut microbiota.
A multi-strain probiotic (Lactobacillus rhamnosus GG plus Saccharomyces boulardii) was continued for at least 4 weeks after the course. Separating the probiotic from the antibiotic dose by about 2 hours is standard pharmacy guidance rather than a parameter tested in the cited trial.
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Disclosure
These statements have not been evaluated by the Food and Drug Administration. Any grade on this page describes the strength of published human trial evidence in the populations studied. It is not a recommendation for any individual and is not medical advice. Starting, stopping or changing any supplement or medication is a decision for your physician.
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