What kind of medicine is cycloserine and how much does a box cost?

Cycloserine is an anti-tuberculosis drug that is a second-line treatment drug and is mainly used to treat infections caused by drug-resistant Mycobacterium tuberculosis. The chemical name of this drug is "D-4-amino-3-tetrahydroisoxazolone", and its molecular formula is C3H6N2O2. It is in the form of a white or light yellow crystalline powder, which is hygroscopic, but has no odor and a bitter taste. The melting point of cycloserine is about 155-156°C (it will decompose at this temperature). It is easily soluble in water, slightly soluble in ethanol, and has low solubility in chloroform and ether.

Cycloserine has a relatively broad antibacterial spectrum. In addition to its inhibitory effect on Mycobacterium tuberculosis, it also shows certain antibacterial effects on Gram-positive and Gram-negative bacteria. However, the antibacterial effect of cycloserine is relatively weak compared with first-line anti-tuberculosis drugs such as isoniazid and streptomycin. Its main advantage is that bacteria are less likely to develop resistance to cycloserine, which makes it important in the treatment of drug-resistant Mycobacterium tuberculosis infections.

Clinically, cycloserine is often used in combination with other anti-tuberculosis drugs to improve the therapeutic effect. Since this drug is highly toxic to the nervous system, the patient's response needs to be closely monitored during use and the treatment plan adjusted according to the situation. In addition, cycloserine can also be used to treat urinary tract infections caused by E. coli.

In general, cycloserine is an important second-line anti-tuberculosis drug, especially in the treatment of drug-resistant Mycobacterium tuberculosis infections. However, due to its obvious side effects, it needs to be used with caution and individualized treatment based on the patient's specific conditions.

Cycloserine is currently on the market in China and has been included in the domestic Class B medical insurance items. The specification of each box is 250mg*10 tablets, and the price is about 300 yuan. In addition, we also learned that the Indian company LUPIN has launched a generic version with a specification of 250mg*60 capsules per box and a price of about 600 yuan. This generic version launched overseas has received positive feedback from patients, and patients can choose the version that suits them according to their personal needs.