Novefos Oral Powder

Introduction

Fosfomycin trometamol is a broad-spectrum antibiotic used to treat uncomplicated urinary tract infections (UTIs). It is the trometamol (or tromethamine) salt of fosfomycin, which is a phosphonic acid derivative. Fosfomycin trometamol is known for its unique mechanism of action and its effectiveness against a variety of bacterial pathogens.

Uses

Fosfomycin trometamol is primarily used for:

Treatment of uncomplicated urinary tract infections (UTIs) caused by susceptible bacteria, including Escherichia coli and Enterococcus faecalis.

It is often used as a single-dose treatment for acute cystitis in women.

Brand Name	Novefos
Type	Oral Powder
Weight	3 gm/sachet
Generic	Fosfomycin Trometamol
Manufacturer	Nuvista Pharma Ltd.
Available in	English বাংলা

Mechanism of Action

Fosfomycin trometamol works by inhibiting bacterial cell wall synthesis. It irreversibly binds to and inhibits the enzyme enolpyruvate transferase, which is crucial for the biosynthesis of peptidoglycan in bacterial cell walls. This action disrupts cell wall construction, leading to bacterial cell death.

How Long Does It Take to Work?

Fosfomycin trometamol typically begins to work within a few hours of administration. Most patients start to feel symptomatic relief within 2 to 3 days. The full course of treatment is usually effective in clearing the infection within a week, but symptomatic improvement can be noticed sooner.

Absorption

Fosfomycin trometamol is well absorbed from the gastrointestinal tract. After oral administration, it achieves peak plasma concentrations within 2 to 4 hours. Its absorption is not significantly affected by food.

Route of Elimination

Fosfomycin trometamol is excreted primarily via the kidneys. About 90% of the drug is eliminated unchanged in the urine. A small amount is excreted in the feces.

Dosage

The recommended dosage for women 18 years of age and older for acute cystitis is one sachet of Fosfomycin with or without food. This medicine should not used in children.

Preparation: At first pour the 100 ml purified water in a glass. Then add full contents of one Fosfomycin sachet into purified water and stir to dissolve completely. Drink full mixture immediately after preparation.

The typical dosage for fosfomycin trometamol for the treatment of uncomplicated UTIs is:

One 3-gram dose taken orally as a single dose.

For certain patients, additional dosing or adjustment might be required based on specific clinical conditions and individual patient needs. Always follow the prescribing information provided by a healthcare provider.

Administration

Fosfomycin trometamol is administered orally. It is typically available as a powder that should be dissolved in water before ingestion. The solution should be consumed immediately after preparation.

Side Effects

Common side effects of fosfomycin trometamol include:

Diarrhea
Nausea
Headache
Dizziness

Serious side effects are rare but may include:

Severe allergic reactions
Severe gastrointestinal disturbances

Toxicity

Acute toxicity from fosfomycin trometamol is uncommon. In the event of overdose, symptoms may include gastrointestinal distress and renal impairment. Treatment generally involves supportive care and monitoring. Seek medical attention if an overdose is suspected.

Precautions

Precautions include:

Use with caution in patients with renal impairment as dose adjustment may be necessary.
Monitor for possible allergic reactions, especially in patients with a history of hypersensitivity to antibiotics.
Ensure proper hydration to reduce the risk of crystalluria.

Interaction

Drug Interactions

Fosfomycin trometamol may interact with other medications, including:

Other antibiotics that affect the urinary tract.
Medications that impact renal function.

Consult a healthcare provider to discuss potential drug interactions.

Food Interactions

There are no significant food interactions with fosfomycin trometamol. It can be taken with or without food. However, it should be taken with a full glass of water.

Disease Interaction

Use with caution in individuals with:

Renal impairment
History of severe gastrointestinal reactions

Pregnancy Use

Fosfomycin trometamol is classified as Category B for pregnancy, indicating that there is no evidence of harm to the fetus in animal studies, but there are no well-controlled studies in pregnant women. It should be used during pregnancy only if clearly needed.

Lactation Use

Fosfomycin trometamol is excreted in breast milk in small amounts. It is generally considered safe for use during lactation, but it is advised to consult a healthcare provider before using it while breastfeeding.

Acute Overdose

Acute overdose may cause gastrointestinal symptoms such as nausea, vomiting, and diarrhea. Supportive treatment and hydration are typically required. Seek medical attention if an overdose is suspected.

Contraindication

Fosfomycin trometamol is contraindicated in individuals with:

Hypersensitivity to fosfomycin or any component of the formulation

Use Direction

Follow the prescribed dosage and administration instructions carefully. Dissolve the powder in water as directed and consume the solution immediately. Do not exceed the recommended dose or duration of treatment without consulting a healthcare provider.

Storage Conditions

Store fosfomycin trometamol at room temperature, away from moisture and heat. Keep the medication in its original container and out of reach of children.

Volume of Distribution

The volume of distribution of fosfomycin trometamol is approximately 0.3 L/kg, indicating that it distributes throughout the body but predominantly remains in the urine.

Half Life

The half-life of fosfomycin trometamol is approximately 4 to 6 hours, supporting its dosing schedule as a single-dose treatment.

Clearance

Fosfomycin trometamol is primarily cleared by the kidneys. The clearance rate can be affected by renal function, and dose adjustments may be necessary for patients with impaired renal function.

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