What the FDA labels say about taking them together
Amiloride and tacrolimus
Amiloride's FDA label of May 5, 2023 names tacrolimus in its drug interactions section; the tacrolimus labels PlainMeds reads (4) do not name amiloride. The amiloride label: “… enzyme inhibitor, an angiotensin II receptor antagonist, cyclosporine or tacrolimus, the risk of hyperkalemia may be increased.”
Check it at the source: the amiloride FDA label on DailyMed (effective May 5, 2023, Padagis US LLC); the tacrolimus FDA label on DailyMed (effective July 17, 2026, Stellon Biotech Inc.).
What does the amiloride label say about tacrolimus?
Amiloride label, drug interactionsDrug Interactions When amiloride HCl is administered concomitantly with an angiotensin-converting enzyme inhibitor, an angiotensin II receptor antagonist, cyclosporine or tacrolimus, the risk of hyperkalemia may be increased.
Amiloride label, warningsThe risk of hyperkalemia may be increased when potassium-conserving agents, including amiloride HCl, are administered concomitantly with an angiotensin-converting enzyme inhibitor, an angiotensin II receptor antagonist, cyclosporine or tacrolimus. (See PRECAUTIONS, Drug Interactions .) Warning signs or symptoms of hyperkalemia include paresthesias, muscular weakness, fatigue, flaccid paralysis of the extremities, bradycardia, shock, and ECG abnormalities.
Source: FDA drug label (amiloride hydrochloride), Padagis US LLC, effective May 5, 2023 (SPL set 2b70cf0c-45be-428f-b396-5001ed4e30fc), via openFDA; the full label on DailyMed
What does the tacrolimus label say about amiloride?
Tacrolimus's label (effective July 17, 2026) and its 3 other brand-application labels do not name amiloride in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Tacrolimus), Stellon Biotech Inc., effective July 17, 2026 (SPL set 6b89e8a4-9f11-42e3-8e79-fe617e7c461f), 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
| Amiloride | Tacrolimus | |
|---|---|---|
| Labeled for | High blood pressure, Heart failure | Organ transplant rejection, Eczema (atopic dermatitis) |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.190 per tablet 5 mg tablet | $0.970 per gram 0.1% ointment |
| 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