Doxycycline typically treats acne, Lyme disease, and certain sexually transmitted infections like chlamydia. It’s also a go-to for respiratory infections like pneumonia and bronchitis in specific cases.
Amoxicillin is frequently used for ear infections (otitis media), strep throat, and urinary tract infections (UTIs). It’s also effective against some types of pneumonia and skin infections.
Penicillin, a broader term encompassing various forms like penicillin V and amoxicillin, primarily treats strep throat, syphilis, and some bacterial infections. Specific penicillin types handle different bacterial strains; your doctor will prescribe the correct one.
Remember, this information is for general knowledge. Always consult your doctor or other qualified healthcare professional for diagnosis and treatment. They will assess your specific situation and determine the most appropriate antibiotic for your needs.


