A Guide to Topical Agents for Acne Vulgaris

Acne vulgaris affects millions of people in the UK, causing physical discomfort and emotional distress. Choosing the right topical treatment can be overwhelming given the variety of options available. This guide breaks down the most common topical agents prescribed or sold over the counter in the UK, explaining how they work, their benefits, drawbacks, and which skin types they suit best. Understanding these factors will help you make informed decisions about managing acne effectively.

Different topical acne treatments including creams and gels

Retinoids: Powerful Cell Turnover Boosters

How They Work

Retinoids are derivatives of vitamin A that promote skin cell turnover. They prevent clogged pores by speeding up the shedding of dead skin cells, reducing the formation of comedones (blackheads and whiteheads). Retinoids also have anti-inflammatory properties that help calm acne lesions.

Common Types in the UK

• Adapalene (prescription only)

• Tretinoin (prescription only)

• Tazarotene (prescription only)

• Trifarotene (prescription only)

  
  

Pros

• Effective for all acne types, especially comedonal acne

• Improve skin texture and reduce fine lines

• Long-term use can prevent scarring

  
  

Cons

• Can cause dryness, redness, and peeling, especially during initial use

• Increased sensitivity to sunlight requires diligent sun protection

• Not suitable for very sensitive skin or during pregnancy

  
  

Suitability

Best for oily and combination skin types that tolerate some dryness. People with sensitive or dry skin should start with lower concentrations/frequency and use moisturisers alongside.

Benzoyl Peroxide: The Bacteria Fighter

How It Works

Benzoyl peroxide kills Cutibacterium acnes bacteria that contribute to inflammation and acne formation. It also helps unclog pores by peeling away dead skin cells.

Availability

Available in various strengths (2.5% to 10%) over the counter in gels, creams, and washes.

Pros

• Rapidly reduces inflammatory acne lesions

• Can be combined with other treatments like antibiotics or retinoids

• No bacterial resistance reported

  
  

Cons

• May cause skin dryness, irritation, and redness

• Can bleach fabrics and hair

• Not ideal for very sensitive skin

  
  

Suitability

Works well for inflammatory acne and oily skin. People with sensitive or dry skin should use lower concentrations and apply moisturisers.

Topical Antibiotics: Targeting Infection and Inflammation

How They Work

Topical antibiotics such as clindamycin and erythromycin reduce acne by killing bacteria and reducing inflammation.

Pros

• Effective in reducing inflammatory acne lesions

• Often combined with benzoyl peroxide to prevent antibiotic resistance

  
  

Cons

• Risk of bacterial resistance if used alone

• May cause skin irritation or dryness

• Usually require prescription

  
  

Suitability

Best for moderate inflammatory acne, often used alongside benzoyl peroxide or retinoids for better results.

Azelaic Acid: Gentle and Multifunctional

How It Works

Azelaic acid has antibacterial, anti-inflammatory, and keratolytic (exfoliating) effects. It reduces bacteria, calms inflammation, and helps clear pores.

Pros

• Suitable for sensitive skin and rosacea-prone skin

• Can lighten post-acne marks and pigmentation

• Less irritating than retinoids or benzoyl peroxide

  
  

Cons

• May cause mild stinging or dryness initially

• Takes longer to see results compared to other agents

  
  

Suitability

Ideal for sensitive, combination, and mild to moderate acne. Also beneficial for those with pigmentation issues.

Salicylic Acid: The Exfoliating Beta Hydroxy Acid

How It Works

Salicylic acid penetrates pores to exfoliate inside the follicle, helping to clear blockages and reduce inflammation.

Pros

• Available over the counter in cleansers, toners, and spot treatments

• Helps prevent new acne lesions

• Suitable for oily and combination skin

  
  

Cons

• Can dry out skin if overused

• Less effective for severe inflammatory acne

  
  

Suitability

Good for mild acne and oily skin types. Should be used cautiously on dry or sensitive skin.

Niacinamide: The Soothing Anti-Inflammatory

How It Works

Niacinamide (vitamin B3) reduces inflammation, regulates oil production, and strengthens the skin barrier.

Pros

• Well tolerated by all skin types

• Reduces redness and irritation

• Can improve skin texture and pigmentation

  
  

Cons

• Not a primary acne treatment but useful as an adjunct

• Results take time to appear

  
  

Suitability

Suitable for all skin types, especially sensitive and dry skin. Often combined with other acne treatments.

Clascoterone: The topical hormonal treatment

How it works

Topical clascoterone functions as a non-steroidal anti-androgen, effectively blocking androgen receptors in the skin. This mechanism helps to decrease sebum production and prevent the formation of acne lesions, making it particularly beneficial for patients whose acne is influenced by hormonal factors.

Pros

• Non-steroidal formulation reduces concerns associated with steroid use.

• Targeted action on androgen receptors may provide effective acne control.

• Suitable for patients with acne linked to hormonal changes.

Cons

• Possible skin irritation, including redness and dryness.

• Allergic reactions are rare but may occur.

• Changes in skin pigmentation may happen, though they are infrequent.

Suitability

Topical clascoterone is primarily indicated for individuals with moderate to severe acne vulgaris, especially those experiencing acne with hormonal involvement. It is important for patients to consult with their healthcare provider to determine if this treatment is appropriate for their specific condition.

Choosing the Right Treatment for Your Skin

When selecting a topical acne agent, consider:

• Skin type: Oily skin may tolerate stronger agents like benzoyl peroxide and retinoids, while sensitive or dry skin benefits from azelaic acid or niacinamide.

• Acne type: Comedonal acne responds well to retinoids and salicylic acid; inflammatory acne may need benzoyl peroxide or antibiotics.

• Side effects: Start with lower concentrations to minimise irritation and always use sunscreen.

• Combination therapy: Many dermatologists recommend combining agents (e.g., retinoid plus benzoyl peroxide) for better results and to reduce resistance.

  
  

Practical Tips for Using Topical Acne Treatments

• Apply treatments to clean, dry skin once daily or as directed.

• Introduce one product at a time to monitor skin response.

• Use a gentle, non-comedogenic moisturiser to reduce dryness.

• Avoid harsh scrubs or exfoliants that can worsen irritation.

• Protect skin daily with oil free broad-spectrum sunscreen.

  
  

When to See a Dermatologist

If acne persists despite over-the-counter treatments, worsens, or causes scarring, consult a dermatologist, such as Dr Bryan McDonald. They can prescribe stronger medications, combine therapies, or explore oral treatments.