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Acitretin is a metabolite of etretinate, which was used prior to the introduction of acitretin. Etretinate was discontinued because it had a narrow therapeutic index as well as a long elimination half-life (t 1/2 = 120 days), making dosing difficult. In contrast, acitretin's half-life is approximately 2 days.
Etretinate has been replaced by acitretin, the free acid (without the ethyl ester). While acitretin is less lipophilic and has a half-life of only 50 hours, it is partly metabolized to etretinate in the body, [ 2 ] so that it is still a long-acting teratogen and pregnancy is prohibited for two years after therapy.
Psoriatic erythroderma can be congenital or secondary to an environmental trigger. [12] [13] [14] Environmental triggers that have been documented include sunburn, skin trauma, psychological stress, systemic illness, alcoholism, drug exposure, chemical exposure (e.g., topical tar, computed tomography contrast material), and the sudden cessation of medication.
This is a complete list of androgens/anabolic steroids (AAS) and formulations that are approved by the FDA Tooltip Food and Drug Administration and available in the United States. AAS like testosterone are used in androgen replacement therapy (ART), a form of hormone replacement therapy (HRT), and for other indications.
Conversely, in men, these drugs may actually have functional antiandrogen effects due to their potent progestogenic and hence antigonadotropic activity and capacity to suppress gonadal testosterone production. [3]
Toggle Single-drug formulations subsection. 1.1 Androgens. 1.2 Estrogens. 1.3 Progestogens. 1.4 Others. 2 Multi-drug formulations. Toggle Multi-drug formulations ...
Editor’s note: CNN Films brings the premiere of “Super/Man: The Christopher Reeve Story” to CNN at 8 p.m. ET/PT Sunday. Dana Reeve was devoted to caring for her husband, Christopher Reeve ...
Steroid ring system. This is a list of neurosteroids , or natural and synthetic steroids that are active on the mammalian nervous system through receptors other than steroid hormone receptors . It includes inhibitory , excitatory , and neurotrophic neurosteroids as well as pheromones and vomeropherines .