DOXFIT – LB CAPSULES with powerful formulation of Doxycycline 100mg & Lactic Acid Bacillus 5 Billion Spores is a broad-spectrum antibiotic and probiotic combination indicated for the treatment of a wide range of bacterial infections , including respiratory tract infections , urinary tract infections , skin and soft tissue infections , gastrointestinal infections , and certain sexually transmitted infections , as prescribed by a healthcare professional.