What the FDA labels say about taking them together
Lithium and telmisartan
Telmisartan's FDA label of May 29, 2026 names lithium in its drug interactions section; the lithium labels PlainMeds reads (4) do not name telmisartan. The telmisartan label: “Reversible increases in serum lithium concentrations and toxicity have been reported during concomitant administration of lithium with angiotensin II receptor antagonists including telmisartan.”
Check it at the source: the lithium FDA label on DailyMed (effective December 23, 2025, Glenmark Pharmaceuticals Inc., USA); the telmisartan FDA label on DailyMed (effective May 29, 2026, Alembic Pharmaceuticals Limited).
What does the lithium label say about telmisartan?
Lithium's label (effective December 23, 2025) and its 3 other brand-application labels do not name telmisartan 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 telmisartan label say about lithium?
Telmisartan label, drug interactionsReversible increases in serum lithium concentrations and toxicity have been reported during concomitant administration of lithium with angiotensin II receptor antagonists including telmisartan.
Source: FDA drug label (Telmisartan), Alembic Pharmaceuticals Limited, effective May 29, 2026 (SPL set 4be6575f-ea8d-4cd8-a49d-3d1c93f2621a), 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 | Telmisartan | |
|---|---|---|
| Labeled for | Bipolar disorder | High blood pressure, Heart attack and coronary artery disease |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.104 per capsule 300 mg capsule | $0.106 per tablet 20 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