General
Olux-E Foam has been shown to suppress the HPA axis.
Systemic absorption of topical corticosteroids has caused reversible adrenal
suppression with the potential for glucocorticosteroid insufficiency after withdrawal
from treatment. Manifestations of Cushing's syndrome, hyperglycemia, and glucosuria
can also be produced in some patients by systemic absorption of topical corticosteroids
while on treatment.
Pediatric patients may be more susceptible to systemic toxicity from equivalent
doses because of their larger skin surface to body mass ratios (see PRECAUTIONS:
Pediatric Use).
Conditions which increase systemic absorption include the application of more
potent steroids, use over large surface areas, prolonged use, and the addition
of occlusive dressings. Therefore, patients applying a topical steroid to a
large surface area or to areas under occlusion should be evaluated periodically
for evidence of adrenal suppression (see laboratory tests below). If adrenal
suppression is noted, an attempt should be made to withdraw the drug, to reduce
the frequency of application, or to substitute a less potent steroid.
Recovery of HPA axis function is generally prompt upon discontinuation of topical
corticosteroids. Infrequently, signs and symptoms of glucocorticosteroid insufficiency
may occur, requiring supplemental systemic corticosteroids.
In a study evaluating the potential for HPA axis suppression, using the cosyntropin
stimulation test, Olux-E Foam demonstrated adrenal suppression after two weeks
of twice daily use in patients with atopic dermatitis of at least 30% body surface
area (BSA). The proportion of subjects twelve years of age and older demonstrating
HPA axis suppression was 16.2% (6 out of 37). In this study HPA axis suppression
was defined as serum cortisol level ≤18 mcg/dL
30-min post cosyntropin stimulation. The laboratory suppression was transient;
in all subjects serum cortisol levels returned to normal when tested 4 weeks
post treatment.
Patients with acute illness or injury may have increased morbidity and mortality
with intermittent HPA axis suppression. Patients should be instructed to use
Olux-E Foam for the minimum amount of time necessary to achieve the desired
results (see INDICATIONS AND USAGE).
If irritation develops, Olux-E Foam should be discontinued and appropriate
therapy instituted. Allergic contact dermatitis with corticosteroids is usually
diagnosed by observing a failure to heal rather than noting a clinical
exacerbation as with most topical products not containing corticosteroids. Such
an observation should be corroborated with appropriate diagnostic patch testing.
If concomitant skin infections are present or develop, an appropriate antifungal
or antibacterial agent should be used. If a favorable response does not occur
promptly, use of Olux-E Foam should be discontinued until the infection has
been adequately controlled.
Olux-E Foam should not be used in the treatment of rosacea or perioral dermatitis,
and should not be used on the face or the groin, axillae, or other intertriginous
areas.
Laboratory Tests
The cosyntropin (ACTH1-24) stimulation test may be helpful in evaluating
patients for HPA axis suppression.
Long-term animal studies have not been performed to evaluate the carcinogenic
potential of clobetasol propionate.
Clobetasol propionate was non-mutagenic in four different test systems: the
Ames test, the mouse lymphoma test, the Saccharomyces cerevisiae gene
conversion assay, and the E. coli B WP2 fluctuation test. In the in
vivo mouse micronucleus test a positive finding was observed at 24 hours,
but not at 48 hours, following oral administration at a dose of 2000 mg/kg.
Studies in the rat following subcutaneous administration of clobetasol propionate
at dosage levels up to 0.05 mg/kg per day revealed that the females exhibited
an increase in the number of resorbed embryos and a decrease in the number of
living fetuses at the highest dose.
Teratogenic Effects: Pregnancy Category C
Corticosteroids have been shown to be teratogenic in laboratory animals when
administered systemically at relatively low dosage levels. Some corticosteroids
have been shown to be teratogenic after dermal application to laboratory animals.
Clobetasol propionate has not been tested for teratogenicity when applied topically;
however, it is absorbed percutaneously, and when administered subcutaneously,
it was a significant teratogen in both the rabbit and the mouse. Clobetasol
propionate has greater teratogenic potential than steroids that are less potent.
Teratogenicity studies in mice using the subcutaneous route resulted in fetotoxicity
at the highest dose tested (1 mg/kg) and teratogenicity at all dose levels tested
down to 0.03 mg/kg. These doses are approximately 1.4 and 0.04 times, respectively,
the human topical dose of Olux-E Foam based on body surface area comparisons.
Abnormalities seen included cleft palate and skeletal abnormalities.
In rabbits, clobetasol propionate was teratogenic at doses of 0.003 and 0.01
mg/kg. These doses are approximately 0.02 and 0.05 times, respectively, the
human topical dose of Olux-E Foam based on body surface area comparisons. Abnormalities
seen included cleft palate, cranioschisis, and other skeletal abnormalities.
There are no adequate and well-controlled studies of the teratogenic potential
of clobetasol propionate in pregnant women. Olux-E Foam should be used during
pregnancy only if the potential benefit justifies the potential risk to the
fetus.
Nursing Mothers: Systemically administered corticosteroids appear
in human milk and could suppress growth, interfere with endogenous corticosteroid
production, or cause other untoward effects. It is not known whether topical
administration of corticosteroids could result in sufficient systemic absorption
to produce detectable quantities in breast milk. Because many drugs are excreted
in human milk, caution should be exercised when Olux-E Foam is administered
to a nursing woman.
Pediatric Use: Use in pediatric patients under 12 years of age
is not recommended.
After two weeks of twice daily treatment with Olux-E Foam, 7 of 15 patients
(47%) aged 6 to 11 years of age demonstrated HPA axis suppression. The laboratory
suppression was transient; in all subjects serum cortisol levels returned to
normal when tested 4 weeks post treatment.
In 92 patients from 12 to 17 years of age, safety was similar to that observed
in the adult population. Based on this data, no adjustment of dosage of Olux-E
Foam in adolescent patients 12 to 17 years of age is warranted.
Because of a higher ratio of skin surface area to body mass, pediatric patients
are at a greater risk than adults of HPA axis suppression and Cushing's syndrome
when they are treated with topical corticosteroids. They are therefore also
at greater risk of adrenal insufficiency during and/or after withdrawal of treatment.
Adverse effects including striae have been reported with inappropriate use of
topical corticosteroids in infants and children.
HPA axis suppression, Cushing's syndrome, linear growth retardation, delayed
weight gain, and intracranial hypertension have been reported in children receiving
topical corticosteroids. Manifestations of adrenal suppression in children include
low plasma cortisol levels and an absence of response to ACTH stimulation. Manifestations
of intracranial hypertension include bulging fontanelles, headaches, and bilateral
papilledema. Administration of topical corticosteroids to children should be
limited to the least amount compatible with an effective therapeutic regimen.
Chronic corticosteroid therapy may interfere with the growth and development
of children.
Geriatric Use: A limited number of patients at or above 65 years
of age have been treated with Olux-E Foam (n = 58) in US clinical trials. While
the number of patients is too small to permit separate analysis of efficacy
and safety, the adverse reactions reported in this population were similar to
those reported by younger patients. Based on available data, no adjustment of
dosage of Olux-E Foam in geriatric patients is warranted.
Last updated on RxList: 3/22/2007