Can I eat salt when taking lithium?

Yes, you should maintain a moderate, consistent salt intake when taking lithium — the goal is steady daily sodium consumption, not avoiding salt, because sudden increases or decreases make lithium levels unstable.

What happens if I eat too much salt whilst on lithium?

Eating significantly more salt than usual causes your kidneys to excrete more lithium, potentially lowering your blood levels below the therapeutic range and reducing medication effectiveness.

Does drinking more water lower lithium levels?

Drinking appropriate amounts of water (around 2-2.5 litres daily) is important for lithium stability — excessive water intake can dilute lithium levels whilst dehydration concentrates them, so consistency matters most.

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Can I eat this with Lithium?

Lithium and sodium compete in your kidneys. Big changes in salt or fluid intake directly swing lithium levels.

Also sold as Liskonum, Litarex, Lithonate. Brand names from the NHS Dictionary of Medicines and Devices.

Type any food below for an instant verdict — we check 81 foods and drinks for Lithium (1 to avoid, 79 to take care with) — or tap one below.

Quick answers

Can I eat salt when taking lithium?: Yes, you should maintain a moderate, consistent salt intake when taking lithium — the goal is steady daily sodium consumption, not avoiding salt, because sudden increases or decreases make lithium levels unstable.
What happens if I eat too much salt whilst on lithium?: Eating significantly more salt than usual causes your kidneys to excrete more lithium, potentially lowering your blood levels below the therapeutic range and reducing medication effectiveness.
Does drinking more water lower lithium levels?: Drinking appropriate amounts of water (around 2-2.5 litres daily) is important for lithium stability — excessive water intake can dilute lithium levels whilst dehydration concentrates them, so consistency matters most.

Grounded in the checker below and the full guide. Not a substitute for your pharmacist.

1 · What do you take?

Lithiumalso priadel, camcolit, lithium carbonate

Lithium and sodium compete in your kidneys. Big changes in salt or fluid intake directly swing lithium levels.

Keep salt and fluid intake consistent. Sudden low-salt diets raise lithium levels (toxicity risk); sudden high-salt binges lower them (losing effect). Dehydration — illness, heat, exercise, alcohol — is the biggest danger. Never start a low-sodium diet without your team adjusting monitoring.

Read our full Lithium guide →

2 · What do you want to eat or drink?

Tap a food to see the answer, or type any food or drink in the box above.

Foods to avoid with Lithium· 1

Take care with Lithium· 79

Fine with Lithium· 1

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This checker summarises published guidance (NHS medicine pages, patient information leaflets and drug labels) for general information only. It is not medical advice, it is not exhaustive, and it cannot account for your dose, kidney function, other medicines, or health conditions. Always follow your prescriber, pharmacist, or the patient information leaflet — especially before changing what you eat or drink. See our editorial policy.

Food groups that matter with Lithium

Every medicine each one affects, on one page.