Doxzee 100 antibiotic capsule is a medicine that contains doxycycline to treat some bacterial infections. Doxzee 100 capsule can be used to treat infections caused by bacteria in respiratory, skin and other organs. Doxycycline 100mg capsules are effective against bacteria by preventing them from growing. Doxycycline capsule 100mg uses include treating an infection, per doctor's instructions. Always take this medicine in the recommended dose and duration.