We’re here to help.
Our friendly team is available to help Monday to Friday 9:00am – 5:00pm.
If you need urgent assistance, do not use this service. Call 111, or in an emergency call 999.
Our friendly team is available to help Monday to Friday 9:00am – 5:00pm.
If you need urgent assistance, do not use this service. Call 111, or in an emergency call 999.
0 items in your cart
Fast, discreet delivery
Free delivery over £40
100% UK-based pharmacy
All doctors & pharmacists UK-based
Free advice & support
Clinical support free · Mon–Fri 9am–5pm
Rated 4.9 out of 5
12,000+ verified patient reviews
Why Patients Choose Access Doctor
10+
Years serving UK patients
2,000+
Verified patient reviews
1,000+
Licensed treatments
24/7
Consultation available
Buy phenoxymethylpenicillin online to treat bacterial sinusitis — penicillin antibiotic prescribed after a quick, free online consultation with a UK prescriber. No GP appointment needed.
Order before 3pm — same-day dispatch (MON - FRI)
~5 min consultation
Secure & confidential · Reviewed by a UK prescriber
No subscription required · Free repeat prescriptions · Cancel anytime
Suitable age
18-years +
Max per order
1 course
Consultation
Yes — free online
Phenoxymethylpenicillin (also known as penicillin V) is a penicillin antibiotic used to treat bacterial infections, including acute bacterial sinusitis — a sinus infection caused by bacteria. It works by stopping bacteria from building their cell walls, which kills them and helps your immune system clear the infection so that congestion, facial pain and pressure can settle. It is one of the first-choice antibiotics recommended for bacterial sinusitis in patients who are not allergic to penicillin. It is usually taken several times a day for a short course, and it is important to finish the full course even if you start to feel better. Antibiotics do not help viral sinusitis, which is far more common, so a UK prescriber will review your symptoms during a short, free online consultation to confirm whether phenoxymethylpenicillin is appropriate before it is dispensed and delivered discreetly across the UK.
| Active ingredient | Phenoxymethylpenicillin (penicillin V) 250 mg tablets |
| Type | Penicillin antibiotic (oral tablets/solution) |
| Used for | Acute bacterial sinusitis (first-line in non-penicillin-allergic patients) |
| Typical dose | 500 mg four times daily (course usually 5 days) |
| Pack size | Full treatment course |
| Prescription | POM — reviewed by a UK prescriber |
| How supplied | After free online consultation |
Take phenoxymethylpenicillin exactly as prescribed. A common adult dose for sinusitis is 500 mg four times a day, usually for around five days, but your prescriber will confirm the right dose for you. Take each dose on an empty stomach — at least 30 minutes before food or two hours after — with a glass of water, and try to space the doses evenly through the day. Keep taking it at regular intervals and complete the whole course even if you feel better after a couple of days, as stopping early can let the infection return and contributes to antibiotic resistance. If you miss a dose, take it as soon as you remember unless it is nearly time for the next one; never take a double dose to catch up. If your symptoms get worse, do not improve within a few days of finishing the course, or you develop a high fever or severe facial pain, contact your prescriber or GP.
Phenoxymethylpenicillin (penicillin V) is one of the first-choice antibiotics for acute bacterial sinusitis in people who are not allergic to penicillin. It only helps when sinusitis is caused by bacteria — most sinus infections are viral and clear without antibiotics — so a UK prescriber will check your symptoms first during a free online consultation.
Many people start to feel better within 2 to 3 days of starting phenoxymethylpenicillin, though it can take a little longer. It is important to finish the entire course — usually around five days — even once you feel well, to fully clear the infection and reduce the risk of it returning. If you are no better after completing the course, or get worse at any point, contact your prescriber or GP.
A typical adult dose for acute bacterial sinusitis is 500 mg taken four times a day, usually for five days. It is best taken on an empty stomach with water, with doses spaced evenly through the day. Your prescriber will confirm the exact dose and course length that is right for you during the online consultation.
Yes. Phenoxymethylpenicillin is a prescription-only medicine, so you cannot buy it over the counter, but you can request it online through Access Doctor. You complete a short, free consultation that is reviewed by a UK prescriber, and if it is suitable it is dispensed by our UK pharmacy and delivered discreetly to your door.
You should not take phenoxymethylpenicillin if you are allergic to penicillin or have ever had a serious reaction to it; an alternative such as doxycycline or clarithromycin may be considered instead. Tell your prescriber if you have kidney problems, a history of severe allergies, or take medicines such as methotrexate. If you are pregnant or breastfeeding, let your prescriber know so they can confirm it is appropriate for you.
Drinking alcohol in moderation does not stop phenoxymethylpenicillin from working, so an occasional drink is usually fine. However, while your body is fighting a sinus infection it is best to rest, stay well hydrated and limit alcohol, as it can worsen dehydration and make you feel more unwell. If you feel drowsy or unwell, avoid alcohol until you have recovered.
No reviews yet. Be the first to write one.
Free consultation
Online review by a UK prescriber
Next-day delivery
Order before 3pm where offered
Discreet packaging
Plain outer packaging
