100mg Doxycycline Capsules are formulated to treat infection including chest infections, skin infections, rosacea, dental infections, and sexually transmitted infections. The medicine is also used for the treatment of other conditions, which are not listed here. It contains Doxycycline as an active ingredient responsible for its efficacy. 100mg Doxycycline Capsules come in a preventative packaging that keeps contaminants, moisture, and unwanted substances at bay.