ベタヒスチン塩酸塩 化学特性,用途語,生産方法
効能
鎮暈薬, 血管拡張薬, 抗ヒスタミン薬
説明
Betahistine dihydrochloride (BH.2HCl) is an orally active histamine analog which has been used to control vertigo, lack of hearing and tinnitus related to Ménière’s disease. The mechanism of BH.2HCl is to reduce the pressure of the membranous labyrinth that results in enhancement of the microvasculature circulation and improves the signs of Ménière’s disease. Peroral administration undergoes extensive first-pass metabolism and gastric irritation in patients with peptic ulcer. In treatment of vertigo, a uniform and constant supply of drug is required in order to maintain steady-state concentration of the drug in the body. Unfortunately, BH.2HCl possesses a short half-life of about 3–4 h and requires frequent administration of the drug,12–15 thereby making it an ideal candidate for controlled release preparations.
化学的特性
white to light yellow crystalline powder
使用
Betahistine is belongs to a group of medications used to treat vertigo associated with Ménière's disease. Vertigo is a condition that causes sufferers to have a sensation of rotation or movement of themselves or their surroundings. Ménière's disease is a disorder of the inner ear that causes vertigo in addition to symptoms such as ringing in the ears, headache, and loss of hearing.
Betahistine is used to reduce the number of episodes of vertigo associated with Ménière's disease. It is believed to work by decreasing the pressure in the ear. This pressure is believed to contribute to the sense of dizziness, nausea, and ringing in the ears and hearing loss that people with Ménière's disease experience.
一般的な説明
Pharmaceutical secondary standards for application in quality control provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards
副作用
Stomach upset, nausea, and headache may occur. This medication may also rarely cause drowsiness. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:
rash
itching/swelling (especially of the face/tongue/throat)
severe dizziness
trouble breathing
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
ベタヒスチン塩酸塩 上流と下流の製品情報
原材料
準備製品