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Canesten Oral Capsule 150mg Thrush Treatment

Canesten Oral Capsule 150mg Thrush Treatment

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  • ✔️ Single 150mg fluconazole capsule clears vaginal thrush fast
  • ✔️ Symptoms typically improve within 24 hours of one dose
  • ✔️ Convenient oral treatment — no applicators or pessaries needed
  • ✔️ Suitable for women aged 16–60 with previously diagnosed thrush
  • ✔️ Clinically proven single-dose antifungal treatment for Candida

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What Is Canesten Oral Capsule 150mg for Thrush?

 

Vaginal thrush is incredibly common. In fact, around three-quarters of women will experience it at least once in their lifetime, according to the NHS. It is caused by an overgrowth of a yeast called Candida albicans, which naturally lives on the skin and in the body but can multiply when conditions change. Symptoms typically include itching, soreness, and a thick white discharge. If you have had thrush before and recognise those symptoms, canesten oral capsule 150mg offers a convenient, single-dose treatment you can take by mouth.

This capsule contains 150mg of fluconazole, an antifungal medicine that works systemically — meaning it travels through your bloodstream to tackle the infection from within. It is available over the counter for women aged 16 to 60 who have previously had thrush diagnosed by a doctor. You can browse the full range of thrush treatments in our thrush collection if you would like to compare options.

 

How Does Canesten Oral Capsule 150mg Work?

 

Fluconazole belongs to a class of medicines called triazole antifungals. It targets the fungus directly without harming your body's own cells. Here is how it works step by step:

  • Fluconazole is absorbed into the bloodstream after you swallow the capsule.
  • It inhibits an enzyme called lanosterol 14-alpha-demethylase, which Candida needs to produce ergosterol.
  • Ergosterol is a vital component of the fungal cell membrane — without it, the membrane becomes leaky and unstable.
  • The fungal cells are unable to survive, and the infection clears.

Because it works systemically, a single 150mg dose is usually enough to treat an uncomplicated vaginal thrush infection. Symptoms such as itching and discharge typically begin to improve within 24 hours, with full relief expected within three days.

 

Who Should Use Canesten Oral Capsule 150mg?

 

This capsule is suitable for women who have previously had vaginal thrush confirmed by a healthcare professional and who recognise the same symptoms returning. It is not intended for first-time sufferers, as other conditions can mimic thrush and require different treatment. It is also worth exploring our women's health collection for related products that may support your overall wellbeing.

You may be suitable for this treatment if:

  • You are a woman aged between 16 and 60.
  • You have previously been diagnosed with vaginal thrush by a doctor.
  • You are not pregnant or breastfeeding.
  • You are not taking medicines known to interact with fluconazole (see Section 2 for details).

 

How Does Canesten Oral Capsule Compare to Canesten Pessary?

 

Feature Canesten Oral Capsule 150mg Canesten Pessary 500mg
Route of administration Oral (swallowed) Intravaginal (inserted)
Active ingredient Fluconazole 150mg Clotrimazole 500mg
Number of doses Single capsule Single pessary
Suitable during pregnancy No Yes (with medical advice)

 

How Should You Store Canesten Oral Capsule 150mg?

 

Store the canesten oral capsule 150mg below 25°C in a dry place, away from direct sunlight. Keep it out of the reach and sight of children. Do not use the capsule after the expiry date printed on the packaging. If you are unsure whether your capsule is still suitable to use, speak to your pharmacist before taking it.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Canesten Oral Capsule 150mg specifications
Treatment category Antifungal / Thrush treatment
Mechanism of action Inhibits fungal ergosterol synthesis via lanosterol 14-alpha-demethylase inhibition
Effective against Vaginal thrush (Candida albicans)
Suitable for Women aged 16–60 with previously diagnosed vaginal thrush
Active ingredient Fluconazole 150mg
Pack size 1 capsule
Strength 150mg
UK classification Pharmacy (P) medicine
Drug class Triazole antifungal
Preparation Hard capsule
Route of administration Oral

Specifications of Canesten Oral Capsule 150mg

 

What Is Canesten Oral Capsule 150mg and What Is It Used For?

 

Canesten Oral Capsule 150mg contains fluconazole, a triazole antifungal medicine. It is used to treat vaginal thrush — a common yeast infection caused by Candida albicans. The NHS confirms that thrush is not a sexually transmitted infection, though it can occasionally be passed between partners. This capsule is taken as a single oral dose and is licensed as an over-the-counter medicine for women aged 16 to 60 who have previously had thrush diagnosed by a doctor.

 

What Do You Need to Know Before Using Canesten Oral Capsule 150mg?

 

Do not take this capsule if any of the following apply to you:

  • You are under 16 or over 60 years of age.
  • You are pregnant, think you might be pregnant, or are breastfeeding.
  • You have never had vaginal thrush diagnosed by a doctor before.
  • You have had more than two episodes of thrush in the last six months.
  • You or your partner have any symptoms of a sexually transmitted infection.
  • You have liver or kidney disease.
  • You are allergic to fluconazole or any other azole antifungal.

Fluconazole can interact with a number of medicines. Tell your pharmacist if you are taking any of the following:

  • Warfarin or other anticoagulants — fluconazole can increase bleeding risk.
  • Rifampicin — may reduce the effectiveness of fluconazole.
  • Phenytoin or carbamazepine — levels of these medicines may increase.
  • Ciclosporin — blood levels may rise, increasing the risk of side effects.
  • Midazolam or other benzodiazepines — sedative effects may be prolonged.
  • Terfenadine or astemizole — serious heart rhythm problems may occur; do not take together.

 

How Should You Use Canesten Oral Capsule 150mg?

 

Using this capsule correctly is straightforward. Follow these steps:

  1. Check the expiry date on the pack before use.
  2. Swallow the single capsule whole with a full glass of water.
  3. You can take it with or without food — it makes no difference to how well it works.
  4. Take it at any time of day that suits you.
  5. Do not take more than one capsule per treatment course.
Indication Age Group Dose Frequency
Vaginal thrush Women aged 16–60 150mg (1 capsule) Single dose
Under 16 or over 60 Not applicable Not suitable OTC See a doctor

If your symptoms do not improve within seven days of taking the capsule, or if they return within two months, you should see your GP. You may also find it helpful to explore our athletes foot and fungal infections collection if you are dealing with other fungal conditions alongside thrush.

 

What Are the Possible Side Effects of Canesten Oral Capsule 150mg?

 

Like all medicines, fluconazole can cause side effects, although not everyone experiences them. Most side effects are mild and resolve on their own.

Common side effects (may affect up to 1 in 10 people):

  • Headache
  • Nausea
  • Abdominal pain or discomfort
  • Diarrhoea
  • Flatulence

Less common side effects (may affect up to 1 in 100 people):

  • Dizziness
  • Skin rash or itching
  • Indigestion
  • Taste disturbance

Stop taking the capsule and seek immediate medical attention if you develop a severe skin reaction, yellowing of the skin or eyes (jaundice), unusual bruising, or signs of a serious allergic reaction such as swelling of the face, lips, or throat. These are rare but serious effects that require prompt assessment.

 

How Should You Store Canesten Oral Capsule 150mg?

 

  • Store below 25°C in a dry place.
  • Keep away from direct sunlight and moisture.
  • Keep out of the reach and sight of children.
  • Do not use after the expiry date printed on the carton.
  • Do not dispose of medicines via wastewater or household waste — return unused medicines to your pharmacy.

If you have any questions about storage or whether your capsule is still suitable to use, speak to your pharmacist. For other women's health concerns, our cystitis and bladder infection collection may also be useful, as cystitis and thrush can sometimes occur together.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Canesten Oral Capsule 150mg online in the UK?

You can buy Canesten Oral Capsule 150mg from Cured Pharmacy, a GPhC-registered UK online pharmacy. It is available without a prescription for women aged 16 to 60 who have previously had vaginal thrush diagnosed by a doctor. Simply add it to your basket and complete a short eligibility check at checkout.

How does Canesten Oral Capsule 150mg work in the body?

The active ingredient fluconazole inhibits an enzyme called lanosterol 14-alpha-demethylase, which the Candida fungus needs to build its cell membrane. Without this enzyme working properly, the fungal cells cannot survive and the infection clears. Because it works through the bloodstream, a single 150mg dose is sufficient for an uncomplicated infection.

How do I take Canesten Oral Capsule 150mg step by step?

Swallow the single capsule whole with a full glass of water — you do not need to take it with food. Only one capsule is needed per treatment course, so there is no need to take a second dose. If symptoms persist after seven days, consult your GP rather than taking another capsule.

How long does Canesten Oral Capsule 150mg take to work?

Most women notice an improvement in symptoms such as itching and discharge within 24 hours of taking the capsule. Full resolution of symptoms is typically expected within three days. If you are still experiencing symptoms after seven days, you should see your GP for further assessment.

What are the side effects of Canesten Oral Capsule 150mg and how do I manage them?

Common side effects include headache, nausea, abdominal pain, and diarrhoea — these are usually mild and short-lived. Drinking plenty of water and taking the capsule with a light meal may help reduce stomach discomfort. If you develop a severe rash, yellowing of the skin, or signs of an allergic reaction, stop use immediately and seek medical advice.

Who is eligible to buy Canesten Oral Capsule 150mg without a prescription?

It is available over the counter for women aged 16 to 60 who have previously had vaginal thrush diagnosed by a doctor and who recognise the same symptoms returning. It is not suitable for women who are pregnant, breastfeeding, or taking certain interacting medicines. If you are unsure whether it is right for you, speak to a pharmacist before purchasing.

Can I take Canesten Oral Capsule 150mg if I am pregnant?

No — fluconazole is not recommended during pregnancy. The NHS advises that oral fluconazole should be avoided in pregnancy due to potential risks to the developing baby. If you are pregnant and have thrush, speak to your GP or midwife, who may recommend a topical clotrimazole pessary instead.

What medicines interact with Canesten Oral Capsule 150mg?

Fluconazole interacts with several medicines, including warfarin, rifampicin, phenytoin, ciclosporin, midazolam, and certain antihistamines such as terfenadine. Taking it alongside these medicines can increase the risk of serious side effects. Always tell your pharmacist about all medicines you are currently taking before purchasing this capsule.

What happens if my thrush does not clear up after taking Canesten Oral Capsule 150mg?

If your symptoms have not improved within seven days of taking the capsule, you should see your GP. It is possible that the infection is caused by a different organism, or that a different treatment is needed. Do not take a second capsule without medical advice.

What are the alternatives to Canesten Oral Capsule 150mg?

Alternatives include topical antifungal treatments such as clotrimazole cream or pessaries, which are applied directly to the affected area rather than taken by mouth. You can explore these options in our thrush collection. Some women prefer a combined approach using both an oral capsule and a topical cream for faster symptom relief.

Can men use Canesten Oral Capsule 150mg for thrush?

This specific over-the-counter product is licensed for use in women aged 16 to 60 only. Men who think they have thrush should speak to a pharmacist or GP, as the OTC licensing for this capsule does not extend to male thrush. There are other antifungal treatments available that may be more appropriate — visit our men's health collection for more information.

Can I use Canesten Oral Capsule 150mg more than once?

You should not take more than one capsule per treatment course without medical advice. If you are experiencing recurrent thrush — defined as four or more episodes per year — you should see your GP, as you may need a longer course of antifungal treatment or investigation into an underlying cause.

Is Canesten Oral Capsule 150mg the same as a prescription fluconazole capsule?

Yes — the active ingredient and dose are identical to prescription fluconazole 150mg capsules. The difference is that the OTC version is licensed specifically for women aged 16 to 60 with previously diagnosed vaginal thrush, whereas prescription fluconazole can be used for a wider range of fungal infections and patient groups.

What is the latest research on fluconazole for vaginal thrush?

Fluconazole has been used to treat vaginal thrush for decades and remains one of the most well-studied antifungal medicines available. Current NHS and clinical guidelines continue to recommend a single 150mg oral dose as an effective first-line treatment for uncomplicated vaginal candidiasis. Research into antifungal resistance is ongoing, which is why it is important not to overuse antifungal medicines unnecessarily.

How should I store Canesten Oral Capsule 150mg?

Store the capsule below 25°C in a dry place, away from direct sunlight and out of the reach of children. Do not use it after the expiry date printed on the packaging. If you have an unused capsule you no longer need, return it to your local pharmacy for safe disposal rather than putting it in the bin or flushing it away.

How Should You Use Canesten Oral Capsule 150mg?

Using this capsule is simple, but it is important to follow the instructions carefully to ensure it works as intended. Check the expiry date on the pack before you start, and make sure you have read the patient information leaflet supplied inside the box.

If you are also using a topical cream or pessary alongside this capsule, follow the instructions for those products separately. Do not insert a pessary at the same time as taking the oral capsule unless directed to do so by a healthcare professional.

What Is the Correct Dose of Canesten Oral Capsule 150mg?

The dose for this product is fixed — one 150mg capsule taken as a single oral dose. There is no need to repeat the dose or take it over multiple days for an uncomplicated vaginal thrush infection. If you are unsure whether one dose is sufficient for your situation, speak to your pharmacist before taking it.

When Is the Best Time to Use Canesten Oral Capsule 150mg?

There is no specific time of day that is clinically recommended for taking this capsule — you can take it morning, afternoon, or evening, whichever suits you best. However, if you are prone to nausea, taking it with a light meal or snack may help reduce any stomach discomfort. Most women choose to take it as soon as they recognise their thrush symptoms returning, so treatment can begin promptly.

Fluconazole is absorbed quickly after you take it, and it begins working within a few hours. Symptom improvement is usually noticeable within 24 hours.

How Long Can You Use Canesten Oral Capsule 150mg For?

This product is intended for single-dose, short-term use only. One capsule treats one episode of uncomplicated vaginal thrush. You should not take repeated doses without medical advice. If your symptoms return within two months, or if you experience more than two episodes of thrush in six months, you should see your GP rather than self-treating again.

Recurrent thrush may indicate an underlying condition — such as diabetes or a weakened immune system — that requires investigation. Your GP can advise on longer-term antifungal treatment if needed.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of Canesten Oral Capsule 150mg?

Most people who take this capsule tolerate it well, but like all medicines, it can cause side effects in some people. Common side effects affect up to 1 in 10 people and are generally mild and short-lived.

  • Headache
  • Nausea
  • Abdominal pain or stomach discomfort
  • Diarrhoea
  • Flatulence (wind)

These effects usually resolve on their own within a day or two. Staying well hydrated and taking the capsule with a light meal may help reduce nausea and stomach upset.

What Are the Less Common Side Effects of Canesten Oral Capsule 150mg?

Less common side effects affect up to 1 in 100 people. They are not dangerous for most people but are worth being aware of before you take the capsule.

  • Dizziness or light-headedness
  • Skin rash or itching
  • Indigestion or heartburn
  • Altered or unpleasant taste in the mouth
  • Dry mouth

If dizziness occurs, avoid driving or operating machinery until it passes. A mild skin rash may resolve on its own, but monitor it closely — if it spreads or worsens, seek medical advice promptly.

What Are the Serious Side Effects of Canesten Oral Capsule 150mg?

Serious side effects are rare but require immediate medical attention. Stop taking the capsule and contact a doctor or call 999 if you experience any of the following:

  • Severe skin reaction — blistering, peeling, or widespread rash (possible Stevens-Johnson syndrome)
  • Yellowing of the skin or whites of the eyes (jaundice) — a sign of liver problems
  • Unusual bruising or bleeding
  • Severe allergic reaction — swelling of the face, lips, tongue, or throat, difficulty breathing, or sudden drop in blood pressure
  • Irregular heartbeat or palpitations

These reactions are uncommon, but they are serious. Do not wait to see if they improve on their own — seek help straight away.

What Should You Do If You Experience Side Effects of Canesten Oral Capsule 150mg?

For mild side effects such as headache or nausea, rest and drink plenty of fluids. Over-the-counter pain relief such as paracetamol can help with headache if needed. If side effects are persistent, worsening, or causing significant distress, contact your pharmacist or GP for advice. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Canesten Oral Capsule 150mg Interact With Other Medicines?

Yes — fluconazole has a number of clinically significant drug interactions. It inhibits certain liver enzymes (particularly CYP2C9 and CYP3A4), which means it can increase the blood levels of other medicines you are taking, potentially causing side effects or toxicity. Key interactions include warfarin (increased bleeding risk), phenytoin (increased seizure medicine levels), ciclosporin (increased immunosuppressant levels), and terfenadine or astemizole (risk of serious heart rhythm problems). Always tell your pharmacist about every medicine, supplement, or herbal remedy you are taking before purchasing this capsule.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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