Doxycycline and cephalexin are both antibiotics, but they target bacteria differently. Doxycycline is a tetracycline, inhibiting bacterial protein synthesis. Cephalexin, a first-generation cephalosporin, interferes with bacterial cell wall synthesis. This difference means they are effective against different types of bacteria.
Doxycycline: Key Features
Doxycycline treats various infections, including acne, chlamydia, and Lyme disease. It’s available as a capsule, tablet, or liquid. Remember to take it with a full glass of water and avoid dairy products, antacids, or iron supplements near the time of dosing, as these can reduce absorption. Common side effects include nausea, diarrhea, and photosensitivity (increased sun sensitivity).
Cephalexin: Key Features
Cephalexin is commonly used for skin, respiratory tract, and urinary tract infections. It’s usually taken orally, and dosage varies depending on the infection. Potential side effects include diarrhea, nausea, and stomach upset. Allergic reactions, though less common, can be serious, so inform your doctor of any allergies.
Important Note: This information is for educational purposes only and does not constitute medical advice. Always consult your physician or pharmacist before taking any medication, especially when combining antibiotics.


