ニタゾキサニド

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H302：飲み込むと有害

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P270：この製品を使用する時に、飲食または喫煙をしないこ と。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P501：内容物/容器を．．．に廃棄すること。

ニタゾキサニド 価格

ニタゾキサニド 化学特性,用途語,生産方法

• 外観

  白色～黄赤色～緑色粉末～結晶

• 効能

  抗原虫薬

• 説明

  Nitazoxanide (NT Z) has been approved as an orphan drug for the treatment of diarrhea in children (age, 1–11 years) and is associated with giardiasis, but it also is approved for diarrhea caused by crytosporidiosis in patients with AIDS. Crytosporidiosis is a protozoal infection caused by Cryptosporidi um parvum. The condition is uncommon in healthy individuals but can be life-threatening in immunosuppressed patients and those with HIV infections.

• 化学的特性

  Crystalline Solid

• 使用

  Nitazoxanide has been used:
  
  • to test its anti-viral activity against chikungunya virus
  • as an antiprotozoal agent to test its effect on cell viability in various cancer cell lines
  • to test its effect on human cytomegalovirus (HCMV) infected human fibroblast HFF cells
  
  

• 抗菌性

  In vitro Cryptosporidium parvum sporocytes and oocysts are inhibited by <33 μm, and Giardia lamblia (intestinalis) trophozoites by <10 μm. The metabolite tizoxanide is more active than the parent compound against some isolates. E. histolytica is inhibited by 6–23 μm (parent compound) and 5.6– 28 μm (metabolite), and T. vaginalis by 0.5–15.5 μm (parent compound) and 0.3–12.2 μm (metabolite). Activity against other micro- organisms, including some helminths, bacteria (Clostridium difficile) and viruses (hepatitis C) has also been demonstrated.

• 獲得抵抗性

  Resistance caused by altered expression of genes involved in stress response has been demonstrated in experimental studies with G. lamblia.

• 一般的な説明

  Nitazoxanide (NTZ), a thiazolide compound is a antiparasitic drug with structure similar to niclosamide.

• 応用例（製薬）

  A synthetic broad-spectrum antiparasitic nitroheterocycle (2-acetyloxy- N-(5-nitro-2-thiazolyl) benzamide), formulated for oral use.

• 作用機序

  Nitazoxanide is a pro-drug that is metabolically converted into the deactylated drug tizoxanide (TIZ). The TIZ then undergoes a four-electron reduction of the 5-nitro group giving various short-lived intermediates, which may include the hydroxylamine derivative. It is these reduced products that represent the active form of NTZ. Whereas these intermediates would suggest that NTZ has the same mechanism of action as metronidazole, this does not appear to be the case. Nitazoxanide is thought to inhibit the enzyme pyruvate:ferredoxin oxidoreductase in Trichomonas vaginali s, Entamoeba histolytica, and Cl ostridium perfingens. The results of this inhibition is disruption of the bioenergetics of these organisms. Unlike metronidazole and tinidazole, which fragment DNA and are suspected mutagenic agents, NTZ and TIZ do not cause DNA fragmentation and are not considered to be mutagenic. This might be associated with the higher redox potential found for NTZ, a nitrothiazole, in comparison with very low redox potential found for the nitroimidazoles, such as metronidazole and tinidazole. Additional metabolites of TIZ also includes the glucuronide, which shows some biological activity, and small amounts of an aromatic hydroxylation product.

• 薬物動態学

  After oral administration the major circulating metabolites are tizoxanide (desacetyl nitazoxanide) and its glucuronide. Minor metabolites include salicyluric acid and tizoxanide sulfate. Maximum concentrations of the active metabolites tizoxanide and tizoxanide glucuronide are observed within 1–4 h. Following a single oral dose of 500 mg given with food, the C_max of both metabolites was around 10 mg/L. Tizoxanide has a halflife of around 1–2 h and is >99.9% bound to plasma proteins.

• 臨床応用

  It is indicated for the treatment of diarrhea caused by G. lamblia or C. parvum.

• 副作用

  Nitazoxanide appears well tolerated. Side effects may include abdominal pain diarrhea, headache and nausea.

• 代謝

  Nitazoxanide is available as powder that is reconstituted and dispensed as an oral suspension. The drug is well absorbed from the GI tract and rapidly metabolized, with elimination products appearing in the urine and feces. The only identified products in the plasma are TIZ and its glucuronide. The product can be taken with food.

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ニタゾキサニド スペクトルデータ(¹HNMR)

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