Doxycycline Capsules are a type of antibiotic used to treat various bacterial infections, including respiratory tract infections, skin infections, and sexually transmitted diseases. They belong to the tetracycline class of antibiotics and work by inhibiting the growth of bacteria. Doxycycline Capsules are effective against a wide range of bacteria and are often used when other antibiotics have failed. Take them as directed by your doctor, usually with food, and complete the full course of treatment to ensure the infection is completely eradicated.