Supplements and Lymecycline.
Lymecycline, sold under the brand name Tetralysal, is classified under "tetracycline" in the BNF.
Lymecycline is an antibiotic, usually taken as a short course, and the supplement questions people ask most when given one have reassuring answers. Probiotics are fine to take alongside it and lower the chance of antibiotic-related diarrhoea: space a bacterial probiotic, most Lactobacillus or Bifidobacterium products, about two hours from your dose, while Saccharomyces boulardii, which is a yeast, can be taken at the same time. Vitamins and minerals are mostly not a concern with Lymecycline, but the timing of minerals is: calcium, iron, magnesium and zinc bind it in the gut and can substantially reduce how much of the antibiotic you absorb, and because a standard daily multivitamin usually contains all four, take Lymecycline at least two hours before, or six hours after, any multivitamin or single mineral supplement. High-dose vitamin A is a separate consideration with Lymecycline: both can raise the pressure of the fluid around the brain, so avoid high-dose vitamin A or retinol supplements while taking it and tell your prescriber straight away about any new or worsening headache or changes in vision. The combinations that genuinely matter are listed below with their evidence, and they tend to be specific: supplements that thin the blood, serotonergic supplements stacked on certain antibiotics, and supplements that are really a prescription drug in disguise, such as red yeast rice, which contains the statin lovastatin. The sensible step in every case is to tell your pharmacist what you already take, which is free at any UK community pharmacy.
Below are the 9 documented pairs we have explicitly assessed against Lymecycline in the Distil database: 9 caution. The pairs cluster around 3 mechanisms: Mineral chelation (absorption), Additive raised intracranial pressure, and Reduced renal lithium clearance. Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not on this list is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by supplement, and the missing-item form at the bottom of the page routes any uncatalogued supplement into our next curation pass.
Documented interactions
Last reviewed 9 November 2026. Each interaction below lists the evidence its assessment drew on: some rest on studies of the exact pair, others on mechanism evidence, where a citation may support one part of the reasoning rather than the exact combination. The evidence line on each entry says which.
Mineral chelation (absorption)
Caution Does Calcium interact with Lymecycline?
Calcium binds to lymecycline in the gut and can reduce how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any calcium supplement.
Evidence: Limited human data, from small studies or case reports.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Caution Does Iron interact with Lymecycline?
Iron binds to lymecycline in the gut and can seriously reduce how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any iron supplement.
Evidence: Supported by human study data.
Caution Does Magnesium interact with Lymecycline?
Magnesium can bind to lymecycline in the gut and reduce how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any magnesium supplement.
Evidence: Supported by human study data.
Caution Does Magnesium Glycinate interact with Lymecycline?
Magnesium can bind to lymecycline in the gut and reduce how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any magnesium supplement.
Evidence: Supported by human study data.
Caution Does Magnesium L-Threonate interact with Lymecycline?
Magnesium can bind to lymecycline in the gut and reduce how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any magnesium supplement.
Evidence: Supported by human study data.
Caution Does Zinc interact with Lymecycline?
Zinc may bind to lymecycline in the gut and lower how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any zinc supplement.
Evidence: Limited human data, from small studies or case reports.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Caution Does Zinc Bisglycinate interact with Lymecycline?
Zinc may bind to lymecycline in the gut and lower how much antibiotic you absorb, which may let an infection persist. Take lymecycline at least two hours before, or six hours after, any zinc supplement.
Evidence: Limited human data, from small studies or case reports.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Additive raised intracranial pressure
Caution Does Vitamin A interact with Lymecycline?
Large amounts of vitamin A and tetracycline antibiotics such as lymecycline can each raise the pressure of the fluid around the brain, and both can strain the liver. The lymecycline manufacturer advises against combining it with vitamin A above 10,000 IU a day. If you are on lymecycline, avoid high-dose vitamin A supplements and tell your prescriber straight away about any new or worsening headache or changes in your vision.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Reduced renal lithium clearance
Caution Does Lithium Orotate interact with Lymecycline?
Tetracycline antibiotics such as lymecycline may raise lithium levels in people taking prescription lithium, and the prescribing guidance advises caution. At the small amount of lithium in a typical lithium orotate supplement (around 5 mg) the effect is expected to be very small; it matters more for higher-strength products (around 20 mg) and for anyone whose kidney function is reduced. If you are prescribed lymecycline, check with your pharmacist or GP before using a lithium supplement during the course.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
What this list does not say. Pairs not flagged here are not implicitly safe. They are either not yet in our database, or fall outside our inclusion scope (food-supplement interactions only; for drug-drug interactions, the BNF is authoritative). Use the checker below to surface any supplement, and submit a missing item if you take something we have not catalogued.
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How the checker decides
Every result has a source
Each pair we have assessed is cited to a published study (PMID) or the British National Formulary, so you can read the source yourself.
Four kinds of answer
Severe, caution, no known interaction, and not yet assessed. A pair we have not assessed is never shown as clear.
- Severe
- Caution
- No known interaction
- Not yet assessed
Nothing in our data is not a clearance
When nothing in our data records a problem with a pair, the result says no known interaction at typical doses, which is not a clearance: your pharmacist or GP can check the pair against your full medical history.
A full supplement review, built around you, not a generic stack.
The free checker answers one interaction question at a time. A Distil report reviews the bigger picture: your goals, diet, medications, current supplements and any blood results you provide, then shows what appears worth keeping, changing, adding or leaving out.
- what your diet already covers, so you are not adding a capsule for something food is already handling
- which evidence-graded compounds are worth considering for your goals, and which were considered but left out
- what to keep, change or stop from what you already take, plus the order to introduce anything new
- how your medications and complete supplement stack fit together, with daily timing and a clear point for reassessment
The interaction check is one section of the full report. You also get the reasoning behind each recommendation and the evidence references used.
£49 until 30 June 2027 · £79 from 1 July 2027.
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