Understanding the different types of Canesten
Canesten is a brand of antifungal medication containing the active ingredient clotrimazole, used to treat fungal infections, most commonly yeast infections (vaginal candidiasis). It is available in various forms, including oral capsules, vaginal tablets (pessaries), and creams, each formulated for a specific purpose. The key distinction lies between products designed for internal (vaginal) application and those for external (topical) use.
The key distinction: Internal vs. external Canesten
Internal Canesten creams and pessaries are created to treat the source of the infection, which is inside the vagina. These products often have a higher concentration of the active ingredient and come with an applicator to ensure the medication reaches the right area. External Canesten cream, on the other hand, is designed to relieve the uncomfortable and often persistent symptoms on the external vulva area, such as itching, burning, and soreness.
Using the wrong product in the wrong place can have several implications. The higher concentration of the internal cream can cause unnecessary irritation and a burning sensation if applied to the sensitive external skin. Conversely, using a lower-concentration external cream internally will not effectively treat the underlying vaginal infection, which is necessary for a complete cure. This is why many manufacturers offer combination packs that contain both an internal treatment (pessary or internal cream) and a separate tube of external cream.
Can you use internal Canesten on the outside? Here's why not
While both internal and external Canesten products contain the antifungal agent clotrimazole, their formulations are not interchangeable for a few key reasons:
- Concentration: Internal cream formulations, particularly those designed for a single-day treatment, can have a significantly higher concentration of clotrimazole than external creams. For example, a single-day internal cream might be 10% w/w, while a standard external cream is often 1% or 2%. The skin on the vulva is highly sensitive, and applying a highly concentrated internal cream can cause a burning sensation, redness, or increased irritation.
- Application Method: Internal creams and pessaries are designed to be delivered deep into the vagina using a special applicator, allowing the medication to work directly on the internal infection. The base ingredients are formulated to disperse within the moist vaginal environment. External cream, meanwhile, is designed for simple, topical application and is absorbed into the surface layers of the vulvar skin.
- Treatment Course: The duration of treatment also varies. A high-dose internal cream might be a single-day application, while the lower-strength external cream is typically applied two to three times a day for up to seven days to manage ongoing symptoms. Confusing these treatment courses could lead to ineffective therapy or unnecessary side effects.
What to do if you have both internal and external symptoms
For many women, a yeast infection presents with both internal and external symptoms. In this case, the most effective approach is to use a combination pack, which includes separate products for each area. Canesten combi packs typically include a vaginal tablet or internal cream to cure the internal infection and a smaller tube of external cream to soothe the external itching and burning. This dual-action approach ensures both the cause of the infection and the uncomfortable side effects are addressed simultaneously.
How to use Canesten products correctly
For internal cream or pessary:
- Wash your hands before and after use.
- Insert the cream or pessary as high as possible into the vagina using the provided applicator.
- Perform the treatment, ideally, at bedtime to minimize leakage and allow the medication to work effectively.
- Consider using a panty liner to protect your clothing from any minor leakage.
For external cream:
- Apply a thin, even layer of the cream to the affected area around the vaginal entrance (the vulva).
- Rub it in gently.
- Apply the cream two or three times daily until symptoms disappear.
- Continue using the cream for the full recommended duration, even if symptoms improve, to prevent recurrence.
Internal vs. External Canesten: A comparison
| Feature | Internal Canesten | External Canesten |
|---|---|---|
| Purpose | To treat the source of the yeast infection inside the vagina. | To relieve external symptoms (itching, burning) on the vulva. |
| Concentration | Often higher (e.g., 10% w/w for 1-day cream, 2% w/w for 3-day cream). | Lower (e.g., 1% or 2% w/w). |
| Application | Inserted deep into the vagina using an applicator. | Applied topically to the external vulva area. |
| Format | Vaginal tablets (pessaries), single-dose cream with applicator, or multi-day cream. | Cream in a tube for direct topical application. |
| Treatment Duration | Single application (e.g., 1-day) or multi-day course (e.g., 3-day or 6-day). | Typically applied 2-3 times daily for up to 7 days. |
| Primary Function | Cures the infection. | Soothes external irritation. |
Conclusion: Use the right tool for the job
When it comes to treating a yeast infection, it's critical to use the right medication for the right part of the body. The specific formulations and concentrations of internal and external Canesten products are designed to address the unique needs of each area. Using internal Canesten cream on the outside is not recommended as it can cause irritation and is not the intended treatment for external symptoms. For the most effective and safe treatment, follow the package instructions carefully and consider using a combination pack if you have both internal and external symptoms. If you are unsure or if symptoms persist, it is always best to consult with a healthcare professional, as persistent or recurrent infections may require further evaluation. For more information, you can also read the patient information leaflet (PIL) for Canesten Thrush Combi Internal & External Creams.
What if you've accidentally used internal cream externally?
Don't panic. The active ingredient, clotrimazole, is an antifungal agent present in both products. Minimal systemic absorption occurs with topical application, so acute intoxication is unlikely. The main risk is localized irritation due to the higher concentration and different excipients (inactive ingredients). If you experience increased burning, stinging, or redness, wash the area gently and discontinue use. If symptoms are severe or persist, contact your doctor or pharmacist for advice.
