Character

Light yellow or yellow crystalline powder, smelly, bitter. Soluble in water or methanol, slightly soluble in ethanol or acetone, insoluble in chloroform. Commonly used in its hydrochloride, for light yellow or yellow crystalline powder; It stinks and tastes bitter. Soluble in water or methanol, slightly soluble in ethanol or acetone, insoluble in chloroform. Some synthetic drugs containing doxycycline in water tend to complexate with metal ions in water, forming a red solution and reducing the efficacy.

Application

It is used for upper respiratory tract infection, tonsillitis, biliary tract infection, lymphadenitis, cellulitis and senile chronic bronchitis caused by sensitive gram-positive bacteria and gram-negative bacilli, and also for the treatment of typhus, rottweilosis and mycoplasma pneumonia. It is also used to treat cholera and prevent falciparum malaria and leptospirosis. It is mainly used for upper respiratory tract infection, tonsillitis, biliary tract infection, lymphadenitis, cellulitis and senile chronic bronchitis caused by sensitive Gram-positive cocci and Gram-negative bacilli, and also for typhus, scrub typhus and mycoplasma pneumonia. It can also be used to treat cholera, as well as to prevent falciparum malaria and spirochetes.