What the FDA labels say about taking them together
Lithium and tinidazole
Tinidazole's FDA label of December 27, 2021 names lithium in its drug interactions section; the lithium labels PlainMeds reads (4) do not name tinidazole. The tinidazole label: “Avoid during and up to 3 days after tinidazole therapy Lithium: Monitor serum lithium concentrations Cyclosporine, tacrolimus:”
Check it at the source: the lithium FDA label on DailyMed (effective December 23, 2025, Glenmark Pharmaceuticals Inc., USA); the tinidazole FDA label on DailyMed (effective December 27, 2021, Mission Pharmacal Company).
What does the lithium label say about tinidazole?
Lithium's label (effective December 23, 2025) and its 3 other brand-application labels do not name tinidazole in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Lithium Carbonate), Glenmark Pharmaceuticals Inc., USA, effective December 23, 2025 (SPL set 63b3790f-a9b5-47f4-bae1-ddf8b43c13c1), via openFDA; the full label on DailyMed
What does the tinidazole label say about lithium?
Tinidazole label, drug interactionsAvoid during and up to 3 days after tinidazole therapy ( 7.1 ) Lithium: Monitor serum lithium concentrations ( 7.1 ) Cyclosporine, tacrolimus:
Source: FDA drug label (Tindamax), Mission Pharmacal Company, effective December 27, 2021 (SPL set a0d01539-8413-4703-94cc-d221918630a1), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Lithium | Tinidazole | |
|---|---|---|
| Labeled for | Bipolar disorder | n/a |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.104 per capsule 300 mg capsule | $2.35 per tablet 500 mg tablet |
| Shortage now | No current entry | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once