Amiloride: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Amiloride is a potassium-sparing diuretic, usually combined with another water tablet. It belongs to the Diuretic (extra) group. These specialised diuretics are used for eye pressure, brain swelling or specific salt problems.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Diuretic (extra)
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Used with other water tablets to prevent potassium loss
High blood pressure (usually in combination)
Fluid retention in heart failure or liver disease

Common brand names

India: Biduret (combo)
Worldwide: Midamor

Common side effects

High potassium levels
Nausea or loss of appetite
Headache
Dizziness

Before taking it — precautions

Tell your doctor about kidney disease or diabetes
Avoid potassium supplements and potassium-based salt substitutes unless advised
Some blood-pressure medicines (such as ACE inhibitors) and spironolactone raise potassium further

When to see a doctor urgently

Muscle weakness or a slow or irregular heartbeat (urgent)
Fainting or severe dizziness
Passing very little urine

Not a prescription — no dose shown. The right dose of amiloride depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Why is it combined with another water tablet?

Most water tablets cause potassium loss; amiloride keeps potassium in, balancing this.

Can I use low-sodium salt?

Many low-sodium salts contain potassium, which can be dangerous with amiloride. Ask your doctor.

Why are blood tests needed?

To check potassium and kidney function, especially when starting or changing medicines.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.