Absorption, Distribution and Excretion
Once absorbed through the skin, topical corticosteroids are handled through pharmacokinetic pathways similar to those of systemically administered corticosteroids
Topical corticosteroids can be absorbed from normal intact skin. They are metabolized primarily in the liver and then excreted in the kidneys. Some of the topical corticosteroids and their metabolites are also excreted into the bile.
Topical corticosteroids can be absorbed from normal intact skin. Inflammation and/or other disease processes in the skin increase percutaneous absorption. ... Once absorbed through the skin, topical corticosteroids are handled through pharmacokinetic pathways similar to systemically administered corticosteroids. Corticosteroids are bound to plasma proteins in varying degrees. They are metabolized primarily in the liver and then excreted in the kidneys. Some of the topical corticosteroids and their metabolites are also excreted into the bile. /Topical corticosteroids/

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Metabolism / Metabolites
Primarily hepatic
/Topical corticosteroids/ are metabolized primarily in the liver and then excreted in the kidneys. Some of the topical corticosteroids and their metabolites are also excreted into the bile. /Topical corticosteroids/

Effects During Pregnancy and Lactation
◉ Summary of Use during Lactation
Flurandrenolide has not been studied during breastfeeding. Since only extensive application of the most potent corticosteroids may cause systemic effects in the mother, it is unlikely that short-term application of topical corticosteroids would pose a risk to the breastfed infant by passage into breastmilk. However, it would be prudent to use the least potent drug on the smallest area of skin possible. It is particularly important to ensure that the infant's skin does not come into direct contact with the areas of skin that have been treated. Only the lower potency corticosteroids should be used on the nipple or areola where the infant could directly ingest the drugs from the skin. Only water-miscible cream or gel products should be applied to the breast because ointments may expose the infant to high levels of mineral paraffins via licking. Any topical corticosteroid should be wiped off thoroughly prior to nursing if it is being applied to the breast or nipple area.
◉ Effects in Breastfed Infants
Topical application of a corticosteroid with relatively high mineralocorticoid activity (isofluprednone acetate) to the mother's nipples resulted in prolonged QT interval, cushingoid appearance, severe hypertension, decreased growth and electrolyte abnormalities in her 2-month-old breastfed infant. The mother had used the cream since birth for painful nipples.
◉ Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.

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Protein Binding
Corticosteroids are bound to plasma proteins in varying degrees.

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Interactions
The effect of glucocorticoids on oral anticoagulant therapy is variable, and the efficacy of oral anticoagulants has been reported to be enhanced or diminished with concomitant glucocorticoid administration. Patients receiving glucocorticoids and oral anticoagulants concomitantly should be monitored (e.g., using coagulation indices) in order to maintain desired anticoagulant effect. /Corticosteroids/
Because corticosteroids inhibit antibody response, the drugs may cause a diminished response to toxoids and live or inactivated vaccines. In addition, corticosteroids may potentiate replication of some organisms contained in live, attenuated vaccines and supraphysiologic dosages of the drugs can aggravate neurologic reactions to some vaccines. Routine administration of vaccines or toxoids should generally be deferred until corticosteroid therapy is discontinued. Administration of live virus or live, attenuated vaccines, including smallpox vaccine, is contraindicated in patients receiving immunosuppressive dosages of glucocorticoids. In addition, if inactivated vaccines are administered to such patients, expected serum antibody response may not be obtained. The Public Health Service Advisory Committee on Immunization Practices (ACIP) and American Academy of Family Physicians (AAFP) state that administration of live virus vaccines usually is not contraindicated in patients receiving corticosteroid therapy as short-term (less than 2 weeks) treatment, in low to moderate dosages, as long-term alternate-day treatment with short-acting preparations, in maintenance physiologic dosages (replacement therapy), or if corticosteroids are administered topically, ophthalmically, intra-articularly, bursally, or into a tendon. If immunization is necessary in a patient receiving corticosteroid therapy, serologic testing may be needed to ensure adequate antibody response and additional doses of the vaccine or toxoid may be necessary. Immunization procedures may be undertaken in patients receiving nonimmunosuppressive doses of glucocorticoids or in patients receiving glucocorticoids as replacement therapy (e.g., Addison's disease). /Corticosteroids/
Potassium-depleting diuretics (e.g., thiazides, furosemide, ethacrynic acid) and other drugs that deplete potassium, such as amphotericin B, may enhance the potassium-wasting effect of glucocorticoids. Serum potassium should be closely monitored in patients receiving glucocorticoids and potassium-depleting drugs. /Corticosteroids/
Concomitant administration of ulcerogenic drugs such as indomethacin during corticosteroid therapy may increase the risk of GI ulceration. Aspirin should be used cautiously in conjunction with glucocorticoids in patients with hypoprothrombinemia. Although concomitant therapy with salicylates and corticosteroids does not appear to increase the incidence or severity of GI ulceration, the possibility of this effect should be considered. /Corticosteroids/

: Setaluri V, Clark AR, Feldman SR. Transmittance properties of flurandrenolide tape for psoriasis: helpful adjunct to phototherapy. J Cutan Med Surg. 2000 Oct;4(4):196-8. PubMed PMID: 11231197.

Therapeutic Uses
Glucocorticoids, Synthetic; Glucocorticoids, Topical
Topical corticosteroids of low to medium potency are indicated in the treatment of corticosteroid-responsive dermatologic disorders /mild to moderate atopic dermatitis; contact dermatitis; mild nummular dermatitis; seborrheic dermatitis (facial and intertriginous areas); other mild to moderate forms of dermatitis; other mild to moderate inflammatory dermatoses; intertrigo; lichen planus (facial and intertriginous areas); discoid lupus erythematosus (facial and intertriginous areas); polymorphous light eruption; anogenital pruritus; pruritus senilis; psoriasis (facial and intertriginous areas); xerosis (inflammatory phase/. Occlusive dressings also may be required for chronic or severe cases of lichen simplex chronicus, psoriasis, eczema, atopic dermatitis, or chronic hand eczema. The more potent topical corticosteroids and/or occlusive dressings may be required for conditions such as discoid lupus erythematosus, lichen planus, granuloma annulare, psoriatic plaques, and psoriasis affecting the palms, soles, elbows, or knees. /Corticosteroids (topical); Included in US product labeling/
Flurandrenolide shares the actions of the other topical corticosteroids and is used for the relief of the inflammatory manifestations of corticosteroid-responsive dermatoses.
MEDICATION (VET): Glucocorticoids have profound effects on nearly all cell types and organ systems, particularly immunologic and inflammatory activity. They may be used in either an anti-inflammatory or immunosuppressive capacity, depending on the dosage selected. Glucocorticoids are used for hypersensitivity dermatoses, contact dermatitis, immune-mediated diseases (eg, pemphigus, pemphigoid, lupus erythematosus), and neoplasia (eg, mast cell tumor, lymphoma). ... They may be administered PO, IV, IM, or SC. /Glucocorticoids/

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Drug Warnings
VET: AVOID COVERING OVER 5-10% OF BODY SURFACE, ESP IN PREGNANT ANIMALS.
The following may occur more frequently with occlusive dressings: Maceration of the skin, Secondary infection, Skin atrophy, Striae Miliaria. /Topical corticosteroids/
The following local adverse reactions are reported infrequently with topical corticosteroids but may occur more frequently with the use of occlusive dressings. These reactions are listed in an approximate decreasing order of occurrence: Burning, Itching, Irritation, Dryness, Folliculitis, Hypertrichosis, Acneform eruptions, Hypopigmentation, Perioral dermatitis, Allergic contact dermatitis. /Topical corticosteroids/
Pediatric patients may demonstrate greater susceptibility to topical corticosteroid-induced HPA axis suppression and Cushing's syndrome than do mature patients because of a larger skin surface area to body weight ratio. Hypothalamic-pituitary-adrenal (HPA) axis suppression, Cushing's syndrome, and intracranial hypertension have been reported in pediatric patients receiving topical corticosteroids. Manifestations of adrenal suppression in pediatric patients include linear growth retardation, delayed weight gain, low plasma cortisol levels, and absence of response to ACTH stimulation. Manifestations of intracranial hypertension include bulging fontanelles, headaches, and bilateral papilledema. Administration of topical corticosteroids to pediatric patients should be limited to the least amount compatible with an effective therapeutic regimen. Chronic corticosteroid therapy may interfere with the growth and development of pediatric patients. /Topical corticosteroids/
For more Drug Warnings (Complete) data for FLURANDRENOLIDE (36 total), please visit the HSDB record page.

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Pharmacodynamics
Flurandrenolide is primarily effective because of its anti-inflammatory, antipruritic, and vasoconstrictive actions.

C24H33FO6

436.52

436.226

1524-88-5

1524-88-5 (free);2802-11-1 (acetate);

15209

Crystals from acetone + hexane
WHITE TO OFF-WHITE, FLUFFY CRYSTALLINE POWDER

1.31g/cm3

578.7ºC at 760mmHg

209 - 219ºC

303.8ºC

8.35E-16mmHg at 25°C

1.572

2.498

2

7

2

31

868

9

C[C@@]12[C@@]3(C(CO)=O)[C@@](OC(C)(O3)C)([H])C[C@@]1([H])[C@]4([H])C[C@H](F)C5=CC(CC[C@]5(C)[C@@]4([H])[C@@H](O)C2)=O

POPFMWWJOGLOIF-XWCQMRHXSA-N

InChI=1S/C24H33FO6/c1-21(2)30-19-9-14-13-8-16(25)15-7-12(27)5-6-22(15,3)20(13)17(28)10-23(14,4)24(19,31-21)18(29)11-26/h7,13-14,16-17,19-20,26,28H,5-6,8-11H2,1-4H3/t13-,14-,16-,17-,19+,20+,22-,23-,24+/m0/s1

(1S,2S,4R,8S,9S,11S,12S,13R,19S)-19-fluoro-11-hydroxy-8-(2-hydroxyacetyl)-6,6,9,13-tetramethyl-5,7-dioxapentacyclo[10.8.0.02,9.04,8.013,18]icos-17-en-16-one

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : ~100 mg/mL (~229.09 mM)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

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Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).

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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

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Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).

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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

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Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

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 (Please use freshly prepared in vivo formulations for optimal results.)