环丝氨酸
生产厂家：印度迈克里奥兹（Macleods）公司
功能主治：结核菌抑制药，用于活动性肺结核和肺外结核
用法用量：用法用量 成人每天0.5～1g，分2次服用，初始2周可每次0.25g，每天2次，最大剂量为每天1g。 儿童每天5～20mg/kg，分2～4次服用，首剂用半量。
查看详情
Cycloserine belongs to a class of antibiotics called oxazolidinones. It is active against a wide range of Gram-positive bacteria, including Mycobacterium tuberculosis, the bacterium responsible for causing tuberculosis. This makes it an important drug in the treatment of this deadly disease, particularly in cases where resistance to other antibiotics has emerged.
The mechanism of action of cycloserine involves inhibiting the function of two enzymes in bacteria: alanine racemase and D-alanine:D-alanine ligase. These enzymes play a crucial role in the synthesis of the bacterial cell wall. By blocking their action, cycloserine disrupts the formation of peptidoglycan, which weakens the bacterial cell wall and ultimately leads to bacterial cell death.Cycloserine is primarily used as a second-line treatment option for tuberculosis, especially in cases that have proven resistant to other drugs. It is often used in combination with other antibiotics, such as isoniazid and rifampicin, to enhance treatment outcomes. In addition to tuberculosis, cycloserine has also demonstrated efficacy against other bacterial infections, including urinary tract infections and certain respiratory tract infections caused by Streptococcus pneumoniae.
Although cycloserine is an effective drug, it is not without its own set of potential side effects. Common adverse effects include dizziness, headache, drowsiness, and confusion. More serious side effects can occur, such as seizures, depression, and psychosis. Additionally, it is important to note that cycloserine should be used cautiously in patients with a history of epilepsy or psychiatric disorders.
To minimize the risk of side effects and ensure optimal treatment outcomes, cycloserine therapy requires close monitoring. Regular blood tests are necessary to measure drug levels and detect any potential signs of toxicity. Psychological evaluations may also be conducted to assess the mental well-being of patients during treatment.
In conclusion, cycloserine is a powerful antibiotic that has become an invaluable resource in the battle against bacterial infections. Its unique mechanism of action and effectiveness against drug-resistant strains make it an essential component of the treatment regimens for diseases like tuberculosis. However, due to its potential side effects, careful monitoring and proper patient selection are crucial for the safe and effective use of cycloserine. As research continues, new insights into this remarkable antibiotic may uncover further therapeutic applications, ensuring its ongoing significance in the field of medicine.
