What is Phenoxymethylpenicillin?

Phenoxymethylpenicillin, also known as penicillin V, is an oral penicillin antibiotic used to treat certain bacterial infections. In acute sinusitis, it may be used when an antibiotic is considered appropriate, particularly where symptoms suggest a bacterial infection rather than a simple viral cold.

This product page refers to phenoxymethylpenicillin supplied on a private prescription following an online consultation.

How does Phenoxymethylpenicillin work?

Phenoxymethylpenicillin kills susceptible bacteria by interfering with bacterial cell wall formation. This helps clear the infection and may reduce symptoms such as facial pain or pressure, blocked nose and nasal discharge when the sinusitis is caused by bacteria.

What is Phenoxymethylpenicillin used for on this page?

On this product page, phenoxymethylpenicillin is used specifically for:

- Acute bacterial sinusitis where an antibiotic is considered appropriate

- Sinusitis symptoms such as facial pain or pressure, nasal blockage and thick nasal discharge when bacterial infection is suspected

It is not used here for:

- Routine treatment of simple viral colds

- Severe sinus infection with red-flag symptoms needing urgent assessment

- Long-term or recurrent sinus symptoms without further review

- Children

Your prescriber will confirm phenoxymethylpenicillin is appropriate based on your symptoms, medical history and any other medicines you are using.

Who may be suitable for Phenoxymethylpenicillin?

You may be suitable if:

- You have symptoms consistent with acute sinusitis and an antibiotic is considered appropriate

- Your symptoms have persisted, become more severe, or fit a pattern where bacterial infection is more likely

- You are able to take tablets or capsules several times a day and complete the full course

Your prescriber will consider:

- How long your symptoms have been present and how severe they are

- Whether you have fever, facial pain, worsening symptoms or other features suggesting bacterial infection

- Any history of penicillin allergy

- Any other medicines or health conditions you have

before deciding if phenoxymethylpenicillin is suitable for you.

Who should not use Phenoxymethylpenicillin or needs medical advice first?

Do not use without medical advice if you:

- Are allergic to penicillin or have previously had a serious reaction to a beta-lactam antibiotic

- Have severe sinus symptoms with swelling around the eyes, confusion, severe headache, visual disturbance or signs of serious illness

- Have severe difficulty swallowing tablets or persistent vomiting

- Have glandular fever, unless specifically advised otherwise

- Are pregnant or breastfeeding without checking suitability first

Use with caution and seek prescriber advice if you:

- Have kidney problems

- Have a history of severe allergies or asthma

- Are taking methotrexate, warfarin, probenecid or other medicines that may interact

- Have symptoms that are not clearly acute sinusitis or have had repeated episodes

How do I take Phenoxymethylpenicillin?

Your prescriber will confirm the exact directions.

Practical advice:

- Take it at evenly spaced times through the day

- Swallow with water

- It is usually best taken on an empty stomach, but follow the directions given with your prescription

- Finish the full course unless you are told otherwise by a healthcare professional

If your symptoms get worse, do not improve, or you become more unwell during treatment, seek medical advice.

General self-care advice

- Rest and keep well hydrated

- Simple pain relief such as paracetamol may help if suitable for you

- Saline nasal rinses or sprays may help with congestion

- Avoid smoking and smoky environments, as these may worsen symptoms

- Seek review if symptoms are severe, prolonged or repeatedly returning

Royal Mail Tracked 24

1–2 working days
£3.99

Royal Mail Special Delivery

Guaranteed next working day delivery
£8.95

Discreet Packaging

All orders are sent in plain, unmarked packaging with no indication of the contents. Your privacy is our priority.

Side effects and when to get help

Common side effects can include nausea, stomach upset, diarrhoea and mild rash. These are often mild.

Seek medical advice urgently if you develop swelling of the face or throat, difficulty breathing, severe rash, persistent severe diarrhoea, or signs of a serious allergic reaction after taking the medicine.