Pharmacotherapeutic group: Antipsoriatics; Other antipsoriatics for topical use; Calcipotriol, combinations. ATC Code: D05AX52
Calcipotriol is a vitamin D analogue. In vitro data suggest that calcipotriol induces differentiation and suppresses proliferation of keratinocytes. This is the proposed basis for its effect in psoriasis.
Like other topical corticosteroids, betamethasone dipropionate has anti-inflammatory, antipruritic, vasoconstrictive and immunosuppressive properties, however, without curing the underlying condition. Through occlusion the effect can be enhanced due to increased penetration of the stratum corneum. The incidence of adverse events will increase because of this. In general, the mechanism of the anti-inflammatory activity of the topical steroids is unclear.
Adrenal response to ACTH was determined by measuring serum cortisol levels in patients with both extensive scalp and body psoriasis, using up to 106 g per week combined Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel and Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination ointment.
A borderline decrease in cortisol response at 30 minutes post ACTH challenge was seen in 5 of 32 patients (15.6 %) after 4 weeks of treatment and in 2 of 11 patients (18.2 %) who continued treatment until 8 weeks. In all cases, the serum cortisol levels were normal at 60 minutes post ACTH challenge. There was no evidence of change of calcium metabolism observed in these patients. With regard to HPA suppression, therefore, this study shows some evidence that very high doses of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel and ointment may have a weak effect on the HPA axis.
The efficacy of once daily use of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel was investigated in two randomized, double-blind, 8-week clinical studies including a total of more than 2,900 patients with scalp psoriasis of at least mild severity according to the Investigator's Global Assessment of disease severity (IGA). Comparators were betamethasone dipropionate in the gel vehicle, calcipotriol in the gel vehicle and (in one of the studies) the gel vehicle alone, all used once daily. Results for the primary response criterion (absent or very mild disease according to the IGA at week 8) showed that Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel was statistically significantly more effective than the comparators. Results for speed of onset based on similar data at week 2 also showed Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel to be statistically significantly more effective than the comparators.
| % of patients with absent or very mild disease | Betamethasone dipropionate and Calcipotriol combination gel (n=1,108) | Betamethasone dipropionate (n=1,118) | Calcipotriol (n=558) | Gel vehicle (n=136) |
| week 2 | 53.2 % | 42.8 %1 | 17.2 %1 | 11.8 %1 |
| week 8 | 69.8 % | 62.5 %1 | 40.1 %1 | 22.8 %1 |
1 Statistically significantly less effective than Betamethasone dipropionate and Calcipotriol combination gel (P<0.001)
The efficacy of once daily use of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel on non-scalp regions of the body was investigated in a randomized, double-blind, 8-week clinical study including 296 patients with psoriasis vulgaris of mild or moderate severity according to the IGA. Comparators were betamethasone dipropionate in the gel vehicle, calcipotriol in the gel vehicle and the gel vehicle alone, all used once daily. Primary response criteria were controlled disease according to the IGA at week 4 and week 8. Controlled disease was defined as 'clear' or 'minimal disease' for patients with moderate disease at baseline or 'clear' for patients with mild disease at baseline. The percentage change in Psoriasis Severity and Area index (PASI) from baseline to week 4 and week 8 were secondary response criteria.
| % of patients with controlled disease | Betamethasone dipropionate and Calcipotriol combination gel (n=126) | Betamethasone dipropionate (n=68) | Calcipotriol (n=67) | Gel vehicle (n=35) |
| week 4 | 20.6 % | 10.3 %1 | 4.5 %1 | 2.9 %1 |
| week 8 | 31.7 % | 19.1 %1 | 13.4 %1 | 0.0 %1 |
1 Statistically significantly less effective than Betamethasone dipropionate and Calcipotriol combination gel (P<0.05)
| Mean percentage reduction in PASI (SD) | Betamethasone dipropionate and Calcipotriol combination gel (n=126) | Betamethasone dipropionate (n=68) | Calcipotriol (n=67) | Gel vehicle (n=35) |
| week 4 | 50.2 (32.7) | 40.8 (33.3)1 | 32.1 (23.6)1 | 17.0 (31.8)1 |
| week 8 | 58.8 (32.4) | 51.8 (35.0) | 40.8 (31.9)1 | 11.1 (29.5)1 |
1 Statistically significantly less effective than Betamethasone dipropionate and Calcipotriol combination gel (P<0.05)
Another randomized, investigator-blinded clinical study including 312 patients with scalp psoriasis of at least moderate severity according to the IGA investigated use of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel once daily compared with Daivonex Scalp solution twice daily for up to 8 weeks. Results for the primary response criterion (absent or very mild disease according to the IGA at week 8) showed that Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel was statistically significantly more effective than Daivonex Scalp solution.
| % of patients with absent or very mild disease | Betamethasone dipropionate and Calcipotriol combination gel (n=207) | Daivonex Scalp solution (n=105) |
| week 8 | 68.6 % | 31.4 %1 |
1 Statistically significantly less effective than Betamethasone dipropionate and Calcipotriol combination gel (P<0.001)
A randomized, double-blind long-term clinical study including 873 patients with scalp psoriasis of at least moderate severity (according to the IGA) investigated the use of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel compared with calcipotriol in the gel vehicle. Both treatments were applied once daily, intermittently as required, for up to 52 weeks.
Adverse events possibly related to long-term use of corticosteroids on the scalp, were identified by an independent, blinded panel of dermatologists. There was no difference in the percentages of patients experiencing such adverse events between the treatment groups (2.6 % in the Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel group and 3.0 % in the calcipotriol group; P=0.73). No cases of skin atrophy were reported.
The efficacy of once daily use of Calcipotriol/Betamethasone in the treatment of mild to moderate plaque-type psoriasis was investigated in a randomized, double-blind, 8-week clinical study including 283 subjects (0155/2018). Comparators were gel vehicle alone and Calcipotriol + betamethasone 50 micrograns/g + 0.5 mg/g combination gel (Daivobet® gel). Therapeutic equivalence of Calcipotriol/Betamethasone with Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel (Daivobet® gel) could be concluded based on equivalent mean % change from baseline in PASI at Week 4/Day 29 for both treatments. Superiority of Calcipotriol/Betamethasone compared to gel vehicle was demonstrated based on the higher primary efficacy variable mean % change from baseline in PASI at Week 4/Day 29.
| Relative change from baseline PASI [%] at Week 4 / Day 29 | Calcipotriol/Betamethasone (N=123) | Daivobet® (N=121) | Generic Vehicle (N=39) |
| Mean ± SE | -58.1 ± 2.2 | -59.6 ± 2.3 | -21.8 ± 4.2 |
| 95%-CI | -62.5, -53.7 | -64.42, -55.3 | -30.0 -13.5 |
| Mean difference1 ± SE | | 1.7 ± 3.2 | -36.6 ± 4.7 |
| Mean difference1 95%-CI | | -4.6, 7.9 | -45.7, -27.0 |
| Conclusions2,3 | | Equivalence | Superiority |
1 Difference of relative change vs. Calcipotriol/Betamethasone gel, determined as Calcipotriol/Betamethasone gel minus Daivobet® gel and Calcipotriol/Betamethasone gel minus Generic vehicle gel, respectively
2 Equivalence of Calcipotriol/Betamethasone gel and Daivobet® gel concluded, if the Mean difference 95%-confidence interval is included entirely within the equivalence range of -15% to +15%.
3Superiority of Calcipotriol/Betamethasone gel vs. Generic vehicle gel concluded, if the upper limit of the Mean difference 95%- confidence interval is negative, i.e. does not include zero.
Paediatric population
Scalp
Effects on calcium metabolism were investigated in two uncontrolled open 8-week studies including in total 109 adolescents aged 12-17 years with scalp psoriasis who used up to 69 g per week of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel. No cases of hypercalcaemia and no clinically relevant changes in urinary calcium were reported. The adrenal response to ACTH challenge was measured in 30 patients; one patient showed a decrease in cortisol response to ACTH challenge after 4 weeks of treatment, which was mild, without clinical manifestations, and reversible.
Scalp and body
Effects on calcium metabolism were investigated in one uncontrolled open 8-week trial in 107 adolescents aged 12-17 years with scalp and body psoriasis who used up to 114.2 g per week of Calcipotriol + betamethasone 50 micrograms/g + 0.5 mg/g combination gel. No cases of hypercalcaemia and no clinically relevant changes in urinary calcium were reported. The adrenal response to ACTH challenge was measured in 31 patients; five patients showed a decrease in cortisol response to ACTH challenge where 2 of the 5 patients showed only borderline decreases. Four of the patients showed decrease after 4 weeks of treatment and 2 showed decrease after 8 weeks including 1 patient showing a decrease at both periods. These events were mild, without clinical manifestations, and reversible.