A guide to how Treclin works, who it may be suitable for, and what you can expect during treatment.
What Is Treclin Gel?
Treclin Gel is a prescription-only acne treatment that combines two active ingredients: Clindamycin and Tretinoin. This combination helps target several of the underlying causes of acne at the same time.
Treclin is commonly prescribed for people with mild to moderate acne, particularly when inflammatory spots, blackheads and blocked pores are all contributing to symptoms. Unlike many over-the-counter treatments, it works deeper within the skin and is designed to both treat existing acne and help prevent new spots from developing.
How Does Treclin Work?
Acne occurs when excess oil, dead skin cells and bacteria become trapped within pores, leading to blocked pores, inflammation and spots. Treclin targets the main processes involved in acne development.
- Unblocks existing pores and helps prevent new blockages from forming
- Increases the rate at which skin cells are shed and renewed
- Reduces the growth of acne-causing bacteria (Cutibacterium acnes)
- Reduces redness and inflammation within acne lesions
- Helps decrease the formation of blackheads, whiteheads and inflamed spots
Many patients notice improvements not only in the number of spots they develop but also in overall skin texture, skin clarity and pore congestion over time.
Why Are Clindamycin and Tretinoin Combined?
The two active ingredients in Treclin work in different but complementary ways, targeting both the bacterial and pore-blocking aspects of acne. This is one reason why Treclin is often prescribed for patients who require something stronger than standard over-the-counter treatments.
An antibiotic that helps reduce the bacteria involved in acne development. By lowering bacterial levels on the skin, it helps reduce inflammation and the formation of inflamed spots.
A retinoid that increases the rate at which skin cells are renewed — helping to prevent blocked pores, reduce blackheads and whiteheads, improve skin texture, and support clearer skin over time.
Who Is Treclin Suitable For?
Treclin is generally suitable for adults and adolescents aged 12 years and over who have been assessed by a healthcare professional. It is often considered when patients experience persistent inflammatory acne, recurrent breakouts, or acne that is not improving with pharmacy products.
However, Treclin is not suitable for everyone. You should not use Treclin if you:
Before treatment is supplied, our pharmacy team will assess your symptoms, treatment history and current medications to ensure Treclin is safe and appropriate for you. If Treclin is not suitable, we can discuss alternative acne treatment options.
How to Apply Treclin Correctly
Using Treclin correctly is important for achieving the best possible results while minimising irritation. Following the instructions provided during your consultation will help maximise the benefits of treatment.
- Apply once daily in the evening to clean, dry skin
- Use a thin layer across the affected area only
- Wash your hands before and after application
- Avoid the eyes, lips and inside the nose
- Allow the treatment to absorb fully before applying other products
Many patients are tempted to apply more treatment hoping for faster results, but this usually increases irritation without improving effectiveness.
How Long Does Treclin Take to Work?
Like most prescription acne treatments, results are not immediate. Some patients notice a temporary worsening of acne during the first few weeks — often referred to as a “purging” phase — as blocked pores begin to clear. Stopping treatment too early is one of the most common reasons patients fail to achieve the full benefits.
- Early improvements — often noticeable within 4 to 6 weeks of regular use
- More significant improvements — typically seen after 8 to 12 weeks of consistent treatment
- Best results — many patients achieve these after around 3 months of ongoing use
Because acne develops gradually, successful treatment requires patience and ongoing use.
Common Side Effects and Safety Information
Like all prescription acne treatments, Treclin can cause side effects. These are usually most noticeable during the first few weeks of treatment and often improve as the skin adjusts. Many patients find that using a gentle moisturiser helps improve comfort during treatment.
Because Treclin contains Tretinoin, your skin may become more sensitive to sunlight. We recommend daily SPF 30 or higher, avoiding excessive sun exposure, and taking additional care during sunny weather.
If you experience severe irritation or concerning symptoms, seek professional advice.
Tips for Getting the Best Results
Many patients achieve the best results when Treclin is combined with a simple, supportive skincare routine. Consistency is usually far more important than using multiple products.
- Use treatment consistently — do not skip applications
- Apply only a thin layer to avoid increasing irritation
- Use a gentle cleanser that does not strip the skin
- Moisturise regularly to support skin comfort
- Wear sunscreen every day
- Avoid harsh exfoliants unless specifically advised
- Be patient — allow the treatment time to work
What to Do Next
If you’re struggling with persistent acne and think Treclin may be right for you, our pharmacy team can help. We offer a convenient online consultation service where we assess your symptoms, review your treatment history, and determine whether Treclin is a suitable treatment option.
If appropriate, we can provide personalised guidance on how to use the treatment safely and effectively to maximise your chances of success. With the right treatment plan and consistent use, many patients find that Treclin helps them achieve clearer skin, fewer breakouts, and greater confidence.





