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Hydroquinone 4%, Tretinoin 0.05%, Fluocinolone Acetonide 0.01%: a Safe and Efficacious 12-Month Treatment for Melasma

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Hydroquinone 4%, Tretinoin 0.05%, Fluocinolone Acetonide 0.01%: a Safe and Efficacious 12-Month Treatment for Melasma THERAPEUTICS FOR THE CLINICIAN Hydroquinone 4%, Tretinoin 0.05%, Fluocinolone Acetonide 0.01%: A Safe and Efficacious 12-Month Treatment for Melasma Helen Mary Torok, MD; Terry Jones, MD; Phoebe Rich, MD; Stacy Smith, MD; Eduardo Tschen, MD This article describes a long-term, multicenter, telangiectasia (5 mild and 1 moderate), most of open-label, 12-month study of once-daily fluocin- which had improved by the end of the study. olone acetonide 0.01%, hydroquinone 4%, Results of the efficacy assessments were posi- tretinoin 0.05% (Tri-Luma® Cream, hereinafter tive, with both the patient and the physician called TC [triple combination]) application in the assessing melasma to be either completely or treatment of melasma. A total of 228 patients nearly cleared by the end of the study in more with facial melasma were enrolled and treated; than 90% of cases. In this study, a once-daily 173 patients (76%) completed the study. Most application of TC cream over an extended period patients had 1 to 2 courses of treatment lasting of 12 months showed no notable safety concerns approximately 6 months in total. and offered an effective treatment for melasma. TC cream showed a favorable safety profile: Cutis. 2005;75:57-62. only 3 patients (1%) withdrew from the study due to treatment-related adverse events (AEs). A total of 129 patients (57%) experienced at least elasma (also known as chloasma or mask of one treatment-related AE. Most AEs were pregnancy) is an acquired, often symmetrical expected application-site reactions that were M hyperpigmentation characterized by light to mild and transient in nature and did not require dark brown patches on sun-exposed areas, predomi- remedial therapy. There were no cases of skin nantly on the face (lower cheeks, upper lips, nose, atrophy or skin thinning and only 6 cases of and chin). This chronic condition can be recurrent and may cause considerable embarrassment and 1-3 Accepted for publication April 21, 2004. emotional distress in patients who are affected. Dr. Torok is from HMT Dermatology Associates, Inc, Medina, Ohio. Although the true incidence of melasma is Dr. Jones is from J&S Studies, Bryan, Texas. Dr. Rich is from unknown, it is a very common occurrence. Almost Northwest Cutaneous Research Specialists, Portland, Oregon. 90% of affected patients are women. It commonly Dr. Smith is from Therapeutics, Inc, La Jolla, California. occurs in women who are pregnant or using oral Dr. Tschen is from Academic Dermatology Associates, Albuquerque, New Mexico. contraceptives or hormone replacement therapy; The clinical study was supported by Hill Pharmaceuticals. also, it can often be seen in women without a pre- Dr. Torok is a consultant and advisory board member for disposing factor. The disease may affect any racial Galderma Pharmaceuticals. Dr. Smith is on the speakers bureau group or skin type but is more commonly found in for Galderma Pharmaceuticals. Drs. Jones, Rich, and Tschen darker skinned individuals, such as Hispanics, report no conflict of interest. 4-6 Reprints: Helen M. Torok, MD, Trilium Creek Dermatology Center, Asians, or other racial groups. 5783 Wooster Pike Rd, Medina, OH 44256 The etiology of melasma is poorly understood. (e-mail: [email protected]). Factors involved in the pathogenesis include genetic VOLUME 75, JANUARY 2005 57 Therapeutics for the Clinician influences, exposure to UV radiation, pregnancy, may reduce the irritation or inflammation caused and hormone therapy. Other implicated factors by HQ and tretinoin.2 include the use of certain cosmetics, phototoxic Recently, a stable fixed combination therapy drugs, and anticonvulsant medications.1 The treat- was developed containing fluocinolone acetonide ment of melasma remains a challenge, even if key (FA), a low-potency (group VI) corticosteroid.23 treatment elements are followed (eg, use of sun- The formula of this triple-combination (TC) ther- blocks, avoidance of the sun).7-8 apy consists of FA 0.01%, HQ 4%, tretinoin 0.05% Hydroquinone (HQ) is the most commonly (Tri-Luma® Cream). This combination has been used treatment for melasma but has a relatively low shown to be safe and effective in the treatment of efficacy as monotherapy, and recurrences are com- melasma for up to 8 weeks.23 mon. HQ is a hydroxyphenol that is thought to Some authors have expressed concern regarding work by blocking the synthesis of melanin via the the risk for skin atrophy and telangiectasia after inhibition of tyrosinase.9-11 This compound has long-term topical administration of corticoste- been used for more than 30 years and is considered roids.21 This risk may be reduced in combination the gold standard. Various clinical studies have therapy because it has been shown that tretinoin shown the usefulness of HQ for lightening skin in prevents corticosteroid-induced atrophy without patients with melasma.7,12-14 HQ is commercially lessening the anti-inflammatory effect.22,24 To available in concentrations from 2% to 5%; higher answer those concerns and because melasma is a concentrations are typically more irritating, with long-term recurring disease, a 12-month multicen- only modest increases in efficacy.2,12,15 Although ter study was conducted to confirm the safety and improvement in melasma can be seen after just 8 to efficacy of TC in the treatment of melasma. 12 weeks of therapy with HQ, maximal efficacy may not be seen for many months.7 In addition, Methods HQ is an unstable compound that quickly loses its The study was conducted in accordance with the efficacy if antioxidants are not added to the prepa- principles of the Declaration of Helsinki and its ration. Hence, combination treatments containing amendments, and in compliance with regulatory HQ are difficult to prepare. requirements. Patients provided written informed Tretinoin, a topical retinoic acid, also has been consent before study procedures. shown to be effective in the treatment of Patients—To be included in the study, patients of melasma.16,17 It is widely believed to work by stim- either gender had to be at least 18 years of age and ulating cell turnover, thus promoting the rapid loss have melasma. Patients were excluded if they had of pigment via epidermopoesis.18 In addition, it facial skin conditions that may have interfered with may have an inhibitory effect on tyrosinase. When study objectives or evaluations, were immunocom- used alone, tretinoin tends to be effective but may promised or under immunosuppressive treatment, or require 6 months of treatment or longer.16 As a had contraindications for corticosteroid treatment. result, tretinoin is commonly combined with one Patients also were excluded if they had exposure to or more other agents to accelerate the beneficial the sun on a regular basis, had consistent irritation effect. Tretinoin also has the potential to induce of the exposed skin, or both. DNA synthesis of epidermal and dermal cells. This Women of childbearing potential had to use is thought to be helpful in counteracting the effective methods of birth control during treatment, atrophogenic effects of topical steroids by increas- with a negative urine pregnancy test result at initia- ing skin thickness.19 tion and completion of each treatment period. In 1975, Kligman and Willis20 published impres- Methods—After washing, patients applied the sive studies using topical combination therapy for TC cream once daily approximately 30 minutes depigmenting human skin, consisting of HQ 5%, before bedtime. A sunscreen with a sun protection tretinoin 0.1%, and dexamethasone 0.1%, a topical factor of 30 and both UVA and UVB protection was corticosteroid. Following these findings, articles provided for daily use. Protective clothing and avoid- were published proposing various other combina- ance of sun exposure to the face was recommended; tion therapies for melasma.2,12,21,22 These combina- cosmetics and mild moisturizer were allowed. tions always included HQ and tretinoin and also Patients were evaluated on a monthly basis generally included a corticosteroid. Other cortico- until there was a satisfactory resolution of their steroids were tried, including hydrocortisone and melasma (severity score of 0 or 1), at which time betamethasone2,21,22; it is thought that they may point the treatment was stopped, but sunscreen use inhibit melanin synthesis through a depression of the was continued. Then, patients were followed up general activity of the cell. Moreover, corticosteroids every 2 months while off treatment. If the melasma 58 CUTIS® Therapeutics for the Clinician worsened as confirmed by physician evaluation, Patient Demographics patients were re-treated with TC cream for 8 weeks. Thus, each patient may have received several Characteristic Nϭ228 courses of treatment during the 12-month study. Safety—Safety was assessed throughout the Mean age, y (SD) 45.1 (9.2) study by adverse event (AE) reporting and labora- Gender, n (%) tory test results. Anticipated skin changes, includ- ing erythema, skin peeling, burning, or stinging, Male 6 (3) were specifically solicited by the investigator at Female 222 (97) each visit. In addition, patients were examined at each visit, with special attention given to the pres- Race, n (%) ence of telangiectasia, rosacea, dermatitis, atrophy, or worsening pigmentation. A complete blood cell White 148 (65) count, serum chemistries, and urinalysis were per- Black 16 (7) formed at selected sites each time treatment was initiated and completed. Asian 12 (5) Efficacy—To assess efficacy, the degree of pig- Other 52 (23) mentation of the target melasma lesion was scored at each visit by the investigator using the following scale: Skin phototype, n (%) 0ϭmelasma lesion approximately equivalent to sur- I 28 (12) rounding normal skin or with minimal residual hyperpigmentation, 1ϭmild (slightly darker than II 72 (32) the surrounding normal skin), 2ϭmoderate (moder- III 64 (28) ately darker than the surrounding normal skin), and 3ϭsevere (markedly darker than the surrounding IV 64 (28) normal skin).
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