Co-amilofruse

Basic Co-amilofruse information

• INN (international nonproprietary name): furosemide and amiloride
• Brand names available in the United Kingdom: Frumil; generic co-amilofruse tablets
• ATC code: C03EB01
• Forms and dosages: Tablets 40 mg furosemide / 5 mg amiloride
• Manufacturers in the United Kingdom: Sanofi (Frumil) and generic manufacturers
• Registration status in the United Kingdom: Prescription-only medicine (POM)
• OTC / Rx classification: Prescription-only medicine (POM)

Everyday use and best practices

Co-amilofruse is a diuretic used to manage fluid retention. Following a few simple practices helps the treatment to work well.

Morning vs evening dosing

Commonly, the initial dose of co-amilofruse is recommended in the morning to help avoid nocturia, a condition that causes frequent nighttime urination. For those who may require additional management, splitting the dose into two parts is a practical option.

To ensure consistency, here are a few handy tips:

• Set a daily alarm as a reminder.
• Keep the tablets visible, perhaps next to your toothbrush or kettle.
• Use a medication tracking app or journal.

Taking with or without meals

Co-amilofruse can be taken with or without food. Taking it with food may help if it upsets your stomach. Follow the advice of your prescriber on fluid and salt intake.

Safety priorities

Who should avoid it

Co-amilofruse must be avoided, or used with caution, in certain patient groups. This includes individuals with severe renal impairment, known allergies to its components (including sulfonamides), high blood potassium levels, or Addison's disease. A thorough medical history should always be reviewed before starting treatment.

Activities to limit

When initiating treatment or adjusting dosage, patients might experience dizziness or dehydration, impacting activities requiring full alertness. It's advisable to limit driving or operating machinery until the body's response is well understood. Work safety should also be assessed, especially in environments requiring constant attention.

Dosage and adjustments

General regimen

The usual adult dose is one tablet (40 mg furosemide, 5 mg amiloride) taken in the morning. Depending on the response, the dose can be increased up to a maximum of two tablets daily, preferably divided between morning and lunchtime.

Special cases

For elderly patients or those with existing comorbidities, cautious titration of the dose is important due to increased sensitivity to medications. Regular monitoring is essential to tailor the dosage effectively while preventing complications associated with improper dosing.

What’s inside and how it works

Ingredients overview

Co-amilofruse combines two active ingredients: furosemide and amiloride, both essential diuretics. Furosemide is a loop diuretic that effectively increases urine production by inhibiting sodium and chloride reabsorption in the kidneys. In heart failure or fluid retention, this means less fluid accumulation and reduced swelling. On the other hand, amiloride is a potassium-sparing diuretic, which helps to retain potassium while still promoting diuresis. This combination minimises the risk of hypokalaemia, a common side effect of diuretics.

Mechanism basics explained simply

Co-amilofruse works by acting on different points in the kidney’s filtration system. Furosemide primarily increases urine output by affecting the loop of Henle, and amiloride complements this action by blocking sodium channels in the distal tubules. This dual action increases urine production while preserving potassium levels, which is important for patients at risk of electrolyte imbalances.

Main indications

Approved uses

Co-amilofruse is licensed in the UK for treating fluid retention (oedema) associated with congestive heart failure, and with cirrhosis of the liver.

Off-label uses in UK clinics

Beyond its licensed indications, co-amilofruse is occasionally prescribed off-label, for example for fluid overload due to other conditions. Such uses should be discussed with a healthcare provider.

Interaction warnings

Food interactions

Alcohol can exacerbate dehydration, a potential side effect of this medication, leading to dizziness and low blood pressure, so moderation is advised. Avoid potassium supplements and salt substitutes containing potassium unless advised by your prescriber.

Drug conflicts

Notable interactions include NSAIDs, which may reduce the diuretic effect, and ACE inhibitors, which can enhance potassium retention. Regular monitoring of electrolyte levels is important for anyone taking this medication alongside other therapies. Suspected side effects can be reported through the Yellow Card scheme.

Alternative choices

Several alternative medications are available on the NHS that serve similar purposes as co-amilofruse:

• Moduretic: A combination of amiloride and hydrochlorothiazide, offering similar benefits but may lead to potassium loss.
• Spironolactone: a potassium-sparing diuretic, often used with a loop diuretic; it may cause hormonal side effects.

Each alternative has advantages and disadvantages, so discuss the options with a healthcare provider.

Regulation snapshot

Co-amilofruse, a combination of furosemide and amiloride, is licensed by the UK Medicines and Healthcare products Regulatory Agency (MHRA) as a prescription-only medicine (POM). It is dispensed only with a valid prescription.

The patient information leaflet and summary of product characteristics are available online. Healthcare professionals monitor for potential side effects and interactions during treatment.

Frequently asked questions

Some common questions about co-amilofruse:

What is co-amilofruse used for?
Co-amilofruse is prescribed for fluid retention (oedema) associated with heart failure and liver cirrhosis.

What are the common side effects of co-amilofruse?
Patients may experience increased urination, mild dizziness, or gastrointestinal disturbances like nausea. Serious side effects are rare but should be monitored.

Can I buy co-amilofruse without a prescription?
No, co-amilofruse is a prescription-only medicine (POM) in the UK and must be prescribed by a healthcare professional.

How should I take co-amilofruse?
The usual dose is one tablet (40 mg/5 mg) taken in the morning. It’s important to follow the dosage advised by your healthcare provider and not adjust it without consultation.

Guidelines for proper use

UK pharmacist counselling style

Pharmacists can check:

• Your understanding of dosage and frequency.
• Any concerns about side effects or interactions with other medications.
• Your health status, particularly if there are changes in kidney function or blood pressure.

NHS patient support advice

NHS resources for patients prescribed co-amilofruse include:

• Access to patient information leaflets explaining the medication.
• National reporting systems for side effects, enabling patients to communicate any adverse reactions.
• NHS 111 for urgent queries.

Delivery information