Peringatan Keamanan

Acute toxicity to vitamin A can occur when adults or children ingest >100x or >20x the RDA, respectively, over a period of hours or a few days.A37787 The RDA for vitamin A differs depending on age and sex and can range from 300 - 900 ?g retinol activity equivalents (RAE) per day.L15386 Symptoms of acute systemic toxicity generally include mucocutaneous involvement (e.g. xerosis, cheilitis, skin peeling) and may involve mental status changes.A216971 Children are typically more susceptible to acute vitamin A toxicity - daily intakes of as little as 1500 IU/kg have been observed to result in toxicity.A37787

Chronic vitamin A toxicity can develop following the long-term ingestion of high vitamin A doses. While there is a wide variation in the lowest toxic vitamin A dose, the ingestion of >25 000 IU daily for 6 years or 100,000 IU daily for 6 months is considered to be toxic.A37787 Chronic vitamin A toxicity can affect many organ systems and can lead to the development of osteoporosis and CNS effects (e.g. headaches).A216971

Vitamin A

DB00162

small molecule approved nutraceutical vet_approved

Deskripsi

Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of carotenoids found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.

Struktur Molekul 2D

Berat 286.4516
Wujud solid

Peta Jejaring Molekuler
Legenda: ObatTargetGenEnzim(Panah → menunjukkan arah efek / relasi)TransporterCarrier

Profil Farmakokinetik

Waktu Paruh (Half-Life) 1.9 hours
Volume Distribusi -
Klirens (Clearance) -

Absorpsi

Readily absorbed from the normal gastrointestinal tract

Metabolisme

Hepatic. Retinol is conjugated with glucuronic acid; the B-glucuronide undergoes enterohepatic circulation and oxidation to retinol and retinoic acid. Retinoic acid undergoes decarboxylation and conjugation with glucuronic acid.

Rute Eliminasi

Data eliminasi belum tersedia.

Interaksi Obat

59 Data
Orlistat Orlistat can cause a decrease in the absorption of Vitamin A resulting in a reduced serum concentration and potentially a decrease in efficacy.
Bexarotene The risk or severity of adverse effects can be increased when Vitamin A is combined with Bexarotene.
Diethylstilbestrol The therapeutic efficacy of Diethylstilbestrol can be decreased when used in combination with Vitamin A.
Estradiol The therapeutic efficacy of Estradiol can be decreased when used in combination with Vitamin A.
Ethinylestradiol The therapeutic efficacy of Ethinylestradiol can be decreased when used in combination with Vitamin A.
Mestranol The therapeutic efficacy of Mestranol can be decreased when used in combination with Vitamin A.
Estradiol cypionate The therapeutic efficacy of Estradiol cypionate can be decreased when used in combination with Vitamin A.
Estradiol valerate The therapeutic efficacy of Estradiol valerate can be decreased when used in combination with Vitamin A.
Estetrol The therapeutic efficacy of Estetrol can be decreased when used in combination with Vitamin A.
Desogestrel The therapeutic efficacy of Desogestrel can be decreased when used in combination with Vitamin A.
Megestrol acetate The therapeutic efficacy of Megestrol acetate can be decreased when used in combination with Vitamin A.
Levonorgestrel The therapeutic efficacy of Levonorgestrel can be decreased when used in combination with Vitamin A.
Medroxyprogesterone acetate The therapeutic efficacy of Medroxyprogesterone acetate can be decreased when used in combination with Vitamin A.
Norethisterone The therapeutic efficacy of Norethisterone can be decreased when used in combination with Vitamin A.
Ethynodiol diacetate The therapeutic efficacy of Ethynodiol diacetate can be decreased when used in combination with Vitamin A.
Norgestimate The therapeutic efficacy of Norgestimate can be decreased when used in combination with Vitamin A.
Drospirenone The therapeutic efficacy of Drospirenone can be decreased when used in combination with Vitamin A.
Cyproterone acetate The therapeutic efficacy of Cyproterone acetate can be decreased when used in combination with Vitamin A.
Gestodene The therapeutic efficacy of Gestodene can be decreased when used in combination with Vitamin A.
Hydroxyprogesterone caproate The therapeutic efficacy of Hydroxyprogesterone caproate can be decreased when used in combination with Vitamin A.
Dienogest The therapeutic efficacy of Dienogest can be decreased when used in combination with Vitamin A.
Norethynodrel The therapeutic efficacy of Norethynodrel can be decreased when used in combination with Vitamin A.
Norgestrel The therapeutic efficacy of Norgestrel can be decreased when used in combination with Vitamin A.
Gestrinone The therapeutic efficacy of Gestrinone can be decreased when used in combination with Vitamin A.
Lynestrenol The therapeutic efficacy of Lynestrenol can be decreased when used in combination with Vitamin A.
Chlormadinone The therapeutic efficacy of Chlormadinone can be decreased when used in combination with Vitamin A.
Norgestrienone The therapeutic efficacy of Norgestrienone can be decreased when used in combination with Vitamin A.
Quingestanol The therapeutic efficacy of Quingestanol can be decreased when used in combination with Vitamin A.
Demegestone The therapeutic efficacy of Demegestone can be decreased when used in combination with Vitamin A.
Nomegestrol acetate The therapeutic efficacy of Nomegestrol acetate can be decreased when used in combination with Vitamin A.
Acitretin The risk or severity of adverse effects can be increased when Vitamin A is combined with Acitretin.
Alitretinoin The risk or severity of adverse effects can be increased when Vitamin A is combined with Alitretinoin.
Tretinoin The risk or severity of adverse effects can be increased when Vitamin A is combined with Tretinoin.
Tazarotene The risk or severity of adverse effects can be increased when Vitamin A is combined with Tazarotene.
Etretinate The risk or severity of adverse effects can be increased when Vitamin A is combined with Etretinate.
Isotretinoin The risk or severity of adverse effects can be increased when Vitamin A is combined with Isotretinoin.
4-Oxoretinol The risk or severity of adverse effects can be increased when Vitamin A is combined with 4-Oxoretinol.
Fenretinide The risk or severity of adverse effects can be increased when Vitamin A is combined with Fenretinide.
Ro 12-7310 The risk or severity of adverse effects can be increased when Vitamin A is combined with Ro 12-7310.
Zuretinol acetate The risk or severity of adverse effects can be increased when Vitamin A is combined with Zuretinol acetate.
Motretinide The risk or severity of adverse effects can be increased when Vitamin A is combined with Motretinide.
Valproic acid Valproic acid may increase the Pseudotumor Cerebri activities of Vitamin A.
Doxycycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Doxycycline.
Clomocycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Clomocycline.
Tigecycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Tigecycline.
Oxytetracycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Oxytetracycline.
Demeclocycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Demeclocycline.
Tetracycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Tetracycline.
Metacycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Metacycline.
Minocycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Minocycline.
Rolitetracycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Rolitetracycline.
Sarecycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Sarecycline.
Eravacycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Eravacycline.
Omadacycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Omadacycline.
Penimepicycline The risk or severity of pseudotumor cerebri can be increased when Vitamin A is combined with Penimepicycline.
Methotrexate The risk or severity of adverse effects can be increased when Methotrexate is combined with Vitamin A.
Lymecycline The risk or severity of pseudotumor cerebri can be increased when Lymecycline is combined with Vitamin A.
Oxymetazoline The absorption of Vitamin A can be decreased when combined with Oxymetazoline.
Palovarotene The risk or severity of adverse effects can be increased when Vitamin A is combined with Palovarotene.

Target Protein

Retinoic acid receptor RXR-gamma RXRG
Apolipoprotein D APOD
Prostaglandin-H2 D-isomerase PTGDS
Retinol dehydrogenase 12 RDH12
Retinol dehydrogenase 5 RDH5
Retinol dehydrogenase 13 RDH13
Retinal dehydrogenase 2 ALDH1A2
Aldehyde dehydrogenase 1A1 ALDH1A1
Lecithin retinol acyltransferase LRAT
Short-chain dehydrogenase/reductase 3 DHRS3
Retinaldehyde dehydrogenase 3 ALDH1A3
All-trans-retinol 13,14-reductase RETSAT
Retinol dehydrogenase 11 RDH11
Dehydrogenase/reductase SDR family member 4 DHRS4
Retinol dehydrogenase 14 RDH14
Retinol dehydrogenase 8 RDH8

Referensi & Sumber

Synthesis reference: William Oroshnik, "Synthesis of Vitamin A, intermediates and conversion thereof to Vitamin A." U.S. Patent US4092366, issued May, 1948.
Artikel (PubMed)
  • PMID: 16513513
    Roncone DP: Xerophthalmia secondary to alcohol-induced malnutrition. Optometry. 2006 Mar;77(3):124-33.
  • PMID: 16469975
    Penniston KL, Tanumihardjo SA: The acute and chronic toxic effects of vitamin A. Am J Clin Nutr. 2006 Feb;83(2):191-201. doi: 10.1093/ajcn/83.2.191.
  • PMID: 30422511
    Olson JM, Ameer MA, Goyal A: Vitamin A Toxicity .

Contoh Produk & Brand

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Menampilkan 8 dari 828 produk.
International Brands
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