Which antibiotic is effective for treating infections caused by Chlamydia?

Doxycycline is an antibiotic that is effective for treating infections caused by Chlamydia. It is a tetracycline antibiotic that works by inhibiting bacterial protein synthesis, which is crucial for bacterial growth and replication. While Azithromycin is also effective and often used for treating Chlamydia infections due to its single-dose regimen and good tolerability, Doxycycline provides a reliable alternative, particularly in cases where patients may require a longer treatment course or have specific contraindications to azalide antibiotics like Azithromycin.

In addition to its effectiveness against Chlamydia, Doxycycline's oral bioavailability and established literature support its use in treating this sexually transmitted infection, particularly in the context of co-infection with other pathogens such as gonorrhea.

Other antibiotics listed have different purposes: Flagyl (metronidazole) is typically used for anaerobic bacterial infections and certain parasitic infections, while Ceftriaxone is a cephalosporin antibiotic primarily effective against gram-negative infections, including Neisseria gonorrhoeae but not effective against Chlamydia. Therefore, Doxycycline is one of the appropriate choices for Chlamydia infection treatment.