Re: [發問] 聖約翰純路跟皮膚外用藥膏?
推
02/21 13:06,
02/21 13:06
推
02/21 14:11,
02/21 14:11
A酸應該是以A醇的結構儲存在肝臟才對...=.=
找了2篇文章,一篇是文獻,一篇是書,2篇都各有引用的文獻
以下指的都是口服A酸,外用A酸似乎沒有這些困擾..
1.Ramos-e-Silva M, Hexsel DM, Rutowitsch MS, Zechmeister M. Hydroxy acids and
retinoids in cosmetics. Clin Dermatol. 2001 Jul-Aug;19(4):460-6.
463頁
Meals, particularly those with fat content, improve retinoid absorption.
Because of its lipid solubility, etretinate has extensive and prolonged
storage in fat resulting in a serum half life of 80–160 days. Upon
discontinuing the drug, a low level may be detected in the blood for 2 years
or more[1]Retinol released from the liver is carried in the circulatory
system by plasma retinol-binding proteins.
從肝臟釋放出的A醇在結束口服治療2年或更久時間後,仍有少量能在血液中被檢測到。
2.T. Krieg et al. (eds.), Therapy of Skin Diseases:A Worldwide Perspective
on Therapeutic Approaches and Their Molecular Basis, 2010
80頁
Women of childbearing potential who have been treated with acitretin must
continue using contraception for 3 years in view of its teratogenic effects
[2] .
有懷孕可能的女生在中止口服acitretin治療後,最好持續避孕3年
83頁
One major side effect of all retinoids is teratogenicity, especially in early
pregnancy which can persist for up to 2 years after cessation of orally
administered retinoids such as etretinate which may persist in the body for
several years.
所有A酸有致畸性,在口服A酸中止後,A酸留在身體裡的時間可能長達2年,etretinate甚
至可能更久。
引用文獻:
1. Saurat JH. Systemic retinoids. What's new? Dermatol Clin. 1998
Apr;16(2):331-40.
2. van de Kerkhof PC (2006) Update on retinoid therapy of psoriasis in: an
update on the use of retinoids in dermatology. Dermatol Ther 19(5):252–263
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推
02/21 19:06, , 1F
02/21 19:06, 1F
推
02/21 21:41, , 2F
02/21 21:41, 2F
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02/21 22:15, , 3F
02/21 22:15, 3F
推
02/21 22:20, , 4F
02/21 22:20, 4F
指胎兒沒錯
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02/21 22:20, , 5F
02/21 22:20, 5F
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02/21 22:20, , 6F
02/21 22:20, 6F
推
02/21 22:26, , 7F
02/21 22:26, 7F
推
02/21 23:42, , 8F
02/21 23:42, 8F
擦的有皮膚屏障阻隔,經皮吸收進入身體的量較少,研究顯示和正常人一樣,但也不排除
有些人對A酸極敏感,有懷孕計劃停用是最安全的。
推
02/22 00:39, , 9F
02/22 00:39, 9F
我沒看到外用的追蹤存在體內多久的研究,不過理論上,口服存在比外用久沒錯。
補充一下,胎兒的生長和A酸有關,A酸的過量和缺乏都可能致畸,維持正常範圍是最好的
。在預定期間內停用A酸,然後平常從食物攝取胡蘿蔔素和A酯,這2樣可在體內轉成A酸,
應該就不用太擔心了。
推
02/22 09:55, , 10F
02/22 09:55, 10F
※ 編輯: antioxidant (39.12.162.212), 02/22/2017 15:33:47
推
02/22 19:01, , 11F
02/22 19:01, 11F
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