What is Alfatradiol? [ edit ] Alfatradiol, also known as 17α-estradiol ,
Fig.1: Alfatradiol structure What are the uses of this medicine? [ edit ] Alfatradiol is used to treat pattern hair loss, such as androgenic alopecia or pattern baldness.
How does this medicine work? [ edit ] Alfatradiol is a weak estrogen, and acts as an inhibitor of 5α-reductase, which is responsible for the conversion of testosterone to dihydrotestosterone , and plays a role in regulating hair growth.
Who Should Not Use this medicine? [ edit ] Pregnant women, lactating women, and anyone under the age of 18 should not use this medicine.
Is this medicine FDA approved? [ edit ] It is not FDA approved in the United States but was approved in other countries under various brand names
Brand names [ edit ] Avixis by Galdermaa approved in Argentina; Galderma, Peru; Galderma, Paraguay; Galderma, Uruguay; Galderma, Mexico
Ell-Cranell, by Galderma approved in Germany
Pantostin by Georg Simons approved in Germany How should this medicine be used? [ edit ] This medicine is used topically on the scalp and must be applied over a long period of time to prevent further hair loss.
What are the dosage forms and brand names of this medicine? [ edit ] Alfatradiol is sold under the brand names Avicis , Avixis , Ell-Cranell Alpha , and Pantostin. Dosage depends on brand and your condition. Follow the dosage instructions on the package.
What side effects can this medication cause? [ edit ] The ethanol in this drug solution may cause local burning or itching. This solution can cause sebum production.
What special precautions should I follow? [ edit ] Inform your doctor about any medications, over-the-counter productions (e.g. vitamins, herbal supplements), allergies, pre-existing and current health conditions before using Alfatradiol. Some health conditions might impact the effects of the drug, so consult your doctor before starting this medication. Inform you doctor if your condition persists or worsens.
What to do in case of emergency/overdose? [ edit ] In case of overdose , call the poison control helpline of your country. In the United States , call 1-800-222-1222. Can this medicine be used in pregnancy? [ edit ] This medication is not recommended for pregnant or lactating women.
Can this medicine be used in children? [ edit ] This medication is not recommended for patients under 18 years of age.
Estrogens and antiestrogens
Estrogens
ER
*
Steroidal: Alfatradiol
Certain androgens /anabolic steroids (e.g., testosterone , testosterone esters , methyltestosterone , metandienone , nandrolone esters ) (via estrogenic metabolites)
Certain progestins (e.g., norethisterone , noretynodrel , etynodiol diacetate , tibolone )
Clomestrone Cloxestradiol acetate Conjugated estriol Conjugated estrogens Epiestriol Epimestrol Esterified estrogens Estetrol † Estradiol Estradiol esters (e.g., estradiol acetate , estradiol benzoate , estradiol cypionate , estradiol enanthate , estradiol undecylate , estradiol valerate , polyestradiol phosphate , estradiol ester mixtures (Climacteron ))Estramustine phosphate Estriol Estriol esters (e.g., estriol succinate , polyestriol phosphate )Estrogenic substances Estrone Estrone esters
Ethinylestradiol #
Hydroxyestrone diacetate Mestranol Methylestradiol Moxestrol Nilestriol Prasterone (dehydroepiandrosterone; DHEA)
Promestriene Quinestradol Quinestrol
Progonadotropins
Antiestrogens
ER
antagonistsSERMs
/SERDs
)
Aromatase inhibitors
Antigonadotropins *
Androgens /
anabolic steroids (e.g.,
testosterone ,
testosterone esters ,
nandrolone esters ,
oxandrolone ,
fluoxymesterone )
D2 receptor antagonists (prolactin releasers) (e.g., domperidone , metoclopramide , risperidone , haloperidol , chlorpromazine , sulpiride )GnRH
agonistsleuprorelin , goserelin )GnRH
antagonistscetrorelix , elagolix )Progestogens (e.g., chlormadinone acetate , cyproterone acetate , gestonorone caproate , hydroxyprogesterone caproate , medroxyprogesterone acetate , megestrol acetate )
Others *
Mixed mechanism of action: Danazol
Androgens and antiandrogens
Androgens AAS
Antiandrogens
AR
antagonists
Steroidogenesis
Antigonadotropins *
D2 receptor antagonists (
prolactin releasers ) (e.g.,
domperidone ,
metoclopramide ,
risperidone ,
haloperidol ,
chlorpromazine ,
sulpiride )
Estrogens (e.g., bifluranol , diethylstilbestrol , estradiol , estradiol esters , ethinylestradiol , ethinylestradiol sulfonate , paroxypropione )GnRH agonists (e.g., leuprorelin )GnRH antagonists (e.g., cetrorelix )Progestogens (incl., chlormadinone acetate , cyproterone acetate , hydroxyprogesterone caproate , gestonorone caproate , medroxyprogesterone acetate , megestrol acetate )
Others
Estrogen receptor modulators
ER
Agonists *
Steroidal: 2-Hydroxyestradiol
2-Hydroxyestrone 3-Methyl-19-methyleneandrosta-3,5-dien-17β-ol 3α-Androstanediol 3α,5α-Dihydrolevonorgestrel 3β,5α-Dihydrolevonorgestrel 3α-Hydroxytibolone 3β-Hydroxytibolone 3β-Androstanediol 4-Androstenediol 4-Androstenedione 4-Fluoroestradiol 4-Hydroxyestradiol 4-Hydroxyestrone 4-Methoxyestradiol 4-Methoxyestrone 5-Androstenediol 7-Oxo-DHEA 7α-Hydroxy-DHEA 7α-Methylestradiol 7β-Hydroxyepiandrosterone 8,9-Dehydroestradiol 8,9-Dehydroestrone 8β-VE2 10β,17β-Dihydroxyestra-1,4-dien-3-one (DHED) 11β-Chloromethylestradiol 11β-Methoxyestradiol 15α-Hydroxyestradiol 16-Ketoestradiol 16-Ketoestrone 16α-Fluoroestradiol 16α-Hydroxy-DHEA 16α-Hydroxyestrone 16α-Iodoestradiol 16α-LE2 16β-Hydroxyestrone 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol) 17α-Estradiol (alfatradiol )17α-Dihydroequilenin 17α-Dihydroequilin 17α-Epiestriol (16α-hydroxy-17α-estradiol) 17α-Ethynyl-3α-androstanediol 17α-Ethynyl-3β-androstanediol 17β-Dihydroequilenin 17β-Dihydroequilin 17β-Methyl-17α-dihydroequilenin Abiraterone Abiraterone acetate Alestramustine Almestrone Anabolic steroids (e.g., testosterone and esters , methyltestosterone , metandienone (methandrostenolone) , nandrolone and esters , many others; via estrogenic metabolites)Atrimustine Bolandiol Bolandiol dipropionate Butolame Clomestrone Cloxestradiol
Conjugated estriol Conjugated estrogens Cyclodiol Cyclotriol DHEA DHEA-S ent -EstradiolEpiestriol (16β-epiestriol, 16β-hydroxy-17β-estradiol) Epimestrol Equilenin Equilin ERA-63 (ORG-37663) Esterified estrogens Estetrol Estradiol
Estramustine Estramustine phosphate Estrapronicate Estrazinol Estriol
Estrofurate Estrogenic substances Estromustine Estrone
Etamestrol (eptamestrol) Ethinylandrostenediol
Ethinylestradiol
Ethinylestriol Ethylestradiol Etynodiol Etynodiol diacetate Hexolame Hippulin Hydroxyestrone diacetate Lynestrenol Lynestrenol phenylpropionate Mestranol Methylestradiol Moxestrol Mytatrienediol Nilestriol Norethisterone Noretynodrel Orestrate Pentolame Prodiame Prolame Promestriene RU-16117 Quinestradol Quinestrol Tibolone Xenoestrogens: Anise -related (e.g., anethole , anol , dianethole , dianol , photoanethole )Chalconoids (e.g., isoliquiritigenin , phloretin , phlorizin (phloridzin) , wedelolactone )Coumestans (e.g., coumestrol , psoralidin )Flavonoids (incl. 7,8-DHF , 8-prenylnaringenin , apigenin , baicalein , baicalin , biochanin A , calycosin , catechin , daidzein , daidzin , ECG , EGCG , epicatechin , equol , formononetin , glabrene , glabridin , genistein , genistin , glycitein , kaempferol , liquiritigenin , mirificin , myricetin , naringenin , penduletin , pinocembrin , prunetin , puerarin , quercetin , tectoridin , tectorigenin )Lavender oil Lignans (e.g., enterodiol , enterolactone , nyasol (cis -hinokiresinol) )Metalloestrogens (e.g., cadmium )Pesticides (e.g., alternariol , dieldrin , endosulfan , fenarimol , HPTE , methiocarb , methoxychlor , triclocarban , triclosan )Phytosteroids (e.g., digitoxin (digitalis ), diosgenin , guggulsterone )Phytosterols (e.g., β-sitosterol , campesterol , stigmasterol )Resorcylic acid lactones (e.g., zearalanone , α-zearalenol , β-zearalenol , zearalenone , zeranol (α-zearalanol) , taleranol (teranol, β-zearalanol) )Steroid -like (e.g., deoxymiroestrol , miroestrol )Stilbenoids (e.g., resveratrol , rhaponticin )Synthetic xenoestrogens (e.g., alkylphenols , bisphenols (e.g., BPA , BPF , BPS ), DDT , parabens , PBBs , PHBA , phthalates , PCBs )Others (e.g., agnuside , rotundifuran )
MixedSERMs
Antagonists
GPER
Agonists
Antagonists
Unknown
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