Prescribed by my dermatologist nearly two years ago, I began taking doxycycline pills paired with 0.1% tretinoin cream. Around this time period, I would often break out after spending long periods in the sun or sweating from physical activities. After a visit to my dermatologist, she prescribed this medication, which I incorporated into my daily routine. Here is what you need to know about doxycycline and how it actually works for acne. Doxycycline is a tetracycline antibioti