How long does the pharmacological effect of benzathine penicillin last in the body?
May 16, 2023
Source: Cainiu Health
Dr. Yang Shuwen
Introduction
Benzathine penicillin for injection has a pharmacodynamic effect lasting approximately 1 to 2 weeks in the body. It is a long-acting drug that is slowly absorbed after injection, maintaining low drug concentrations while achieving good distribution in tissues and body fluids. Its bactericidal action is primarily achieved by inhibiting the synthesis of bacterial cell walls. Due to individual differences in physical constitution, metabolism, and severity of illness among patients, the duration of the drug's effect may vary.
Benzathine penicillin usually refers to benzathine penicillin for injection. The duration of its pharmacological effect in the body typically lasts from about one to two weeks. Detailed analysis is as follows:
The main active ingredient in benzathine penicillin for injection is benzathine penicillin, a penicillin drug sensitive to β-lactamase. It is used to prevent recurrence of rheumatic fever and to control the spread of streptococcal infections. This medication is long-acting; after injection, it is slowly absorbed, resulting in sustained low drug concentrations. It distributes well into tissues and body fluids and exerts its bactericidal effect primarily by inhibiting bacterial cell wall synthesis. Generally, its effect can last from one to two weeks in the body. However, the actual duration may vary among individuals due to differences in patients' physical conditions, metabolic rates, and severity of illness.
Medication must be strictly taken as prescribed. Patients should not use this drug blindly without medical guidance. Individuals with a history of penicillin allergy or those who test positive on a penicillin skin test should not use this medication. Alcohol consumption or drinking beverages containing alcohol is not recommended during treatment, as it may affect drug efficacy or cause adverse reactions, thereby interfering with disease management.
