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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Etretinate has been replaced by acitretin, the free acid (without the ethyl ester).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.
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 .
This is a list of androgens/anabolic steroids (AAS) or testosterone derivatives. Androgen esters are mostly not included in this list. The major classes of testosterone derivatives include the following (as well as combinations thereof):
Alitretinoin has been granted prescription rights in the UK (08/09/2008) for in chronic hand eczema as used by mouth. [5] In May 2009 the National Institute for Health and Clinical Excellence (NICE) issued preliminary guidance [6] on the use of alitretinoin for the treatment of severe chronic hand eczema in adults.
Continuous erythropoietin receptor activator (CERA) is the generic term for drugs in a new class of third-generation erythropoiesis-stimulating agents (ESAs). In the media, these agents are commonly referred to as 'EPO', short for erythropoietin.
The drug had been priced at $33 but rose to $680 per vial. As an off-patent pharmaceutical, a similar drug, differing in formulation, available in Europe, made by a different manufacturer, sells for $8 per vial. [40]
This gene encodes an alpha-globulin protein with corticosteroid-binding properties. This is the major transport protein for glucocorticoids and progestins in the blood of most vertebrates. The gene localizes to a chromosomal region containing several closely related serine protease inhibitors ( serpins ).