Gels for psoriasis

Gels occupy an important place in topical psoriasis therapy due to their ease of application, rapid drying, and better tolerability in hairy areas and skin folds. According to current guidelines, topical corticosteroids, vitamin D analogs, and fixed-dose combinations of these classes remain the mainstay of treatment for mild cases of the disease, with gel formulations often increasing compliance and treatment effectiveness on the scalp. The guidelines also stipulate the adjunctive role of keratolytics and the limited role of resins, while "alternative" agents without evidence are not recommended. [1]

European and national guidelines emphasize that the choice of carrier influences treatment success no less than the choice of molecule. On the scalp and in areas with increased sweating, gels often outperform ointments in terms of convenience and frequency of application, which is directly related to clinical response. Separately, the high evidence base for the fixed combination of calcipotriol and betamethasone dipropionate in gel form is noted, especially for scalp lesions. [2]

For moderate to severe cases, gels remain an integral part of care and local symptom control, but do not replace phototherapy or systemic treatment. Guidelines recommend considering topical gels as the first step in patients who are "candidates for topical therapy," with systemic treatments being incorporated as indicated without delay. This stepwise approach helps avoid chronic "undertreatment." [3]

Below, we'll discuss gel classes, mechanisms of action, efficacy data, application patterns for different areas, as well as risks and ways to mitigate them. Special attention is given to the scalp and nails, where the gel form is often preferred. [4]

What gels are used for psoriasis?

Basic classes of topical gels include corticosteroids of varying potency, vitamin D analogs, and their fixed-dose combinations. The fixed-dose combination of calcipotriol plus betamethasone dipropionate in a gel has the strongest evidence for plaque psoriasis and, especially, scalp psoriasis, providing a more rapid and pronounced response compared to monotherapies. In clinical practice, a once-daily regimen is more commonly used. [5]

Tazarotene gel occupies a distinct niche. It is a topical retinoid that reduces keratinocyte proliferation and plaque thickness. Clinical trials have shown its effectiveness, but its skin irritation profile is higher than that of vitamin D analogues, so tazarotene is often used in courses, sometimes alternating or in combination with a corticosteroid for improved tolerability. [6]

Gel-based keratolytics, primarily salicylic acid, are used as part of a skincare regimen to gently remove scales and improve the penetration of active ingredients. They do not treat inflammation but enhance comfort and the effectiveness of topical treatments. Coal tars can be produced in gels, but the evidence base is limited and tolerability varies. [7]

Finally, calcineurin inhibitors in gel form are used off-label for psoriasis in sensitive areas, such as folds, where steroids are undesirable. Guidelines allow this tactic in selected patients but emphasize that these are not first-line drugs for plaque psoriasis. [8]

Table 1. Main classes of gels for psoriasis

Class	Examples	Role	Key benefits	Restrictions
Fixed combination vitamin D analogue plus corticosteroid	Calcipotriol plus betamethasone dipropionate	First line treatment for plaque and scalp psoriasis	Fast and clear response, once-a-day convenience	Price, rare skin irritation [9]
Vitamin D analogues	Calcipotriol	Alternative and maintenance	Good tolerability, steroid-sparing effect	Perilesional irritation is possible [10]
Corticosteroids	Betamethasone dipropionate, etc.	Monitoring the activity of foci	Rapid relief of inflammation and itching	Risks of long-term and occlusive use [11]
Retinoid	Tazarotene	Additional option for courses	Decrease in plaque thickness	Irritation, contraindicated in pregnancy [12]
Keratolytic	Salicylic acid	Care and preparation for therapy	Improving drug penetration	Does not directly affect the immune axes of the disease [13]

How does this work

Vitamin D analogs reduce proliferation and normalize keratinocyte differentiation, and partially modulate the local immune response. This leads to a reduction in plaque thickness and scaling. When combined with a corticosteroid, synergy is achieved: the steroid quickly suppresses inflammation and itching, while the vitamin D analog stabilizes epidermal differentiation, maintaining the result. [14]

Corticosteroids bind to the glucocorticoid receptor, reducing the transcription of proinflammatory cytokines and cellular infiltration. Gels make it easier to apply a thin layer to problem areas and the scalp, where creams and ointments are less convenient. The risk of atrophy and telangiectasia depends on the drug's potency, the duration of treatment, and the occlusion, so regimens are limited and switched to steroid-free maintenance. [15]

Tazarotene activates nuclear retinoic acid receptors, which reduces hyperproliferation and normalizes keratinization. Due to retinoid-induced irritation, combination or alternation with a corticosteroid is recommended, especially in sensitive areas. The gel base facilitates even distribution and rapid drying, which is important for hairy areas. [16]

Keratolytics dissolve keratin and remove scales, thereby increasing the bioavailability of active molecules. This is especially useful before applying a fixed combination to thick plaques or as part of an evening scalp care routine. An important rule is to avoid combining high concentrations with strong steroids under tight occlusion without a doctor's prescription. [17]

Table 2. Pathogenesis targets and influence of gel classes

Pathogenetic link	Vitamin D analogues	Corticosteroids	Tazarotene	Keratolytics
Keratinocyte hyperproliferation	They are decreasing	Indirectly	Reduces	They remove the scales
Inflammatory cytokines	Moderate modulation	Strong suppression	Indirectly	It doesn't affect
Barrier and peeling	They are improving	Improve symptoms	Improve the structure	Preparing for therapy [18]

What do studies show about effectiveness?

A fixed-dose combination of calcipotriol and betamethasone dipropionate gel has demonstrated high efficacy in scalp psoriasis and other skin conditions. Randomized trials and registration materials noted rapid improvements in clinical indices within the first few weeks, and the safety profile was favorable with a once-daily regimen. These data have been expanded to include the adolescent population for scalp treatment. [19]

Vitamin D analogues in gel form demonstrate clinically significant reductions in plaque thickness and scaling in mild to moderate cases and are often used as a steroid-sparing component in alternating regimens. According to summary reviews and meta-analyses, their main limitation is local irritation, which is reduced when combined with a corticosteroid. This supports the fixed-dose combination strategy. [20]

Tazarotene gel is effective as monotherapy and in combination, especially on stable plaques, but it often causes irritation and erythema, which is why it is used in courses and on limited areas. Classic trials have documented improvements in signs and symptoms with once-daily regimens, with most adverse events being mild to moderate. [21]

For keratolytics and resins, the evidence base is weaker and generally supports their adjunctive role. Reviews emphasize that these agents should be considered as part of skin care and preparation, rather than as a standalone treatment for inflammation. This is consistent with current guidelines. [22]

Table 3. Key data on gels for psoriasis

Drug and form	Design and population	Mode	Result
Calcipotriol plus betamethasone dipropionate gel	Randomized trials in adults and adolescents with a focus on the scalp	Once a day	Rapid and pronounced response, good tolerability [23]
Calcipotriol gel	Reviews and meta-analyses in mild to moderate forms	Once a day	Decreased thickness and flaking, possible irritation [24]
Tazarotene gel	Randomized and controlled trials	Once a day in courses	Effective, but more likely to cause skin irritation [25]
Keratolytics, gels	Reviews and old comparisons	According to the instructions	Auxiliary role, improving drug penetration [26]

Scalp: Why gel is often more convenient

For scalp psoriasis, a gel base ensures even distribution between hairs and quick drying without a noticeable "greasy" residue. This directly improves compliance, which is critical for chronic therapy. Guidelines and expert opinions recommend a fixed-dose combination of calcipotriol and betamethasone dipropionate in a gel as a first-line option for scalp psoriasis. [27]

The practical algorithm often includes evening or pre-procedure application of a mild gel-based keratolytic to remove scales, followed by once-daily application of an active gel and maintenance emollient treatment on "off" days. This approach improves the drug's penetration into the skin and enhances its effectiveness, especially for thick plaques. [28]

In the adolescent population with scalp lesions, the efficacy and safety of the fixed-dose combination gel are confirmed by registration materials and clinical publications. This expands the possibilities for individualizing therapy in families where convenience and predictability of response are important. However, the duration of treatment courses and the frequency of repetitions are controlled by a physician. [29]

If severe inflammation is accompanied by intense itching, a more potent steroid gel may be used for a short period, followed by a transition to a combination or vitamin D analogue for maintenance. The goal is to quickly reduce the flare-up and minimize the risk of chronic steroid use. [30]

Table 4. Scalp psoriasis

Step	Action	For what
Preparation	Keratolytic gel according to the instructions	Removing scales and improving penetration
Active phase	Fixed combination of calcipotriol plus betamethasone dipropionate once daily	Control of inflammation and proliferation
Maintenance	Vitamin D analogue or interval use of the combination	Reducing the steroid load while maintaining the result
Care	Emollients and mild shampoos	Increasing comfort and commitment [31]

Security and how to ensure it

The fixed-dose gel combination has a favorable safety profile, and the incidence of irritation is lower than with calcipotriol monotherapy. However, general guidelines remain: limit corticosteroid courses, avoid tight occlusion, especially in folds, and monitor delicate areas and the face. For maintenance treatment, regimens containing a vitamin D analogue are preferred. [32]

Tazarotene is more likely to cause irritation and erythema. Alternating with a corticosteroid, applying to dry skin, using the lowest effective concentration, and temporarily discontinuing the retinoid if symptoms worsen may help. Tazarotene is contraindicated during pregnancy and requires contraception in women of reproductive age. [33]

Vitamin D analogs are generally well tolerated. The most common problem is perilesional irritation, which is reduced by combination with a steroid and proper application frequency. Systemic effects with topical application at the recommended dosages are extremely rare. This makes them convenient for maintaining the achieved results. [34]

Keratolytics are safe when used as directed. They should not be applied under tight occlusion with strong steroids or over large surfaces in children. If burning or increased redness occurs, the keratolytic should be temporarily discontinued and the care regimen adjusted. [35]

Table 5. Common risks and how to reduce them

Risk	Who is interested?	What to do
Steroid-induced skin atrophy	Long courses, thin zones	Limit the duration, switch to maintenance vitamin D analogue
Irritation with tazarotene	Sensitive skin	Reduce frequency, alternate with steroid, temporarily stop if symptoms worsen
Irritation with calcipotriol	Face, folds	Use a combination or reduce the frequency of application
Excessive keratolytic action	Children, thin skin	Avoid occlusion and high concentrations unless directed by a physician [36]

How to use gels: schemes and compatibility

A fixed-dose combination of calcipotriol and betamethasone dipropionate gel is applied once daily as a thin layer to the plaques for a limited period as prescribed by a physician. Once control is achieved, maintenance regimens with a vitamin D analogue or intermittent use of the combination are used. This approach reduces the total steroid load. [37]

Tazarotene is typically used in courses on limited areas. To improve tolerability, it can be alternated with a steroid on certain days of the week, or applied in the evening and an emollient in the morning. If irritation is severe, take breaks and return to the medication once the skin has stabilized. [38]

Gel-based keratolytics are used according to the instructions before the active product. This facilitates the removal of scales and increases the availability of active molecules to the skin. It's convenient to apply the keratolytic to the scalp in the evening, and then apply the active gel the following day. [39]

Compatibility with phototherapy and systemic agents is generally favorable, as topical gels act locally. The exception is tazarotene, which increases photosensitivity, so it is usually avoided before ultraviolet irradiation procedures or strictly maintained between treatments. Any changes to the regimen must be discussed with the attending physician. [40]

Table 6. Quick patterns for practice

Situation	What to choose	How to apply
Plaques on the scalp	Calcipotriol plus betamethasone dipropionate gel	Once a day as a course, then maintenance with vitamin D analogue
Local dense plaques	Tazarotene gel with alternating corticosteroid	In the evening, take courses of tazarotene, and during the day, take a steroid as prescribed.
Thick plaques with massive flaking	Keratolytic gel plus active gel	First a keratolytic, then an active drug at intervals
Maintenance of remission	Vitamin D analogue in gel	On an individual schedule without constant steroid [41]

Frequently asked questions

Is it possible to treat the condition solely with gels, without systemic medications? For mild cases, yes, gels are the primary option. For moderate and severe cases, topical treatments do not replace phototherapy and systemic treatment, but are used as a supplement and care. Severity assessment and treatment decisions are based on recommendations. [42]

What's best for the scalp? The most evidence-based treatment is a fixed combination of calcipotriol and betamethasone dipropionate in a gel. Gentle pre-scale removal and regular application once daily are important. Once the effect stabilizes, switch to maintenance regimens. [43]

How to reduce the risk of side effects: Limit the duration of corticosteroid courses, use combinations with a vitamin D analogue, avoid tight occlusion in sensitive areas, adjust the frequency of tazarotene application, and take breaks promptly if irritation occurs. [44]

Is there any point in resins and "natural" gels? The evidence base for resins is limited, and "natural" mixtures are often not standardized. Guidelines prioritize products with proven efficacy and predictable safety. [45]

Key findings

1. For mild plaque and scalp psoriasis, the gel fixed combination of calcipotriol plus betamethasone dipropionate has the best evidence base and a convenient once-daily regimen. This improves compliance and response rates. [46]
2. Vitamin D analogs and tazarotene gels are useful options, but tazarotene is more likely to cause irritation and requires repeated use and alternation. Keratolytic gels improve skin preparation and penetration of active ingredients. [47]
3. Topical gels do not replace phototherapy and systemic treatments for moderate to severe cases. Therapy should be consistent with current recommendations and take into account individual factors. [48]