Can you continue doxycycline and Retin a while undergoing BBL therapy?

Your Esthetician is exactly right. Retin A and Tetracyclines are photosensitizing medications. Your skin becomes sensitive to light and sun putting you at risk for burns during the treatment. Your practitioner would also want to know since this completely changes the settings that they may feel comfortable using on you.For best results and minimial risk for burns, stop using any photosensitizing medications 2 weeks before. 

Our office specializes in IPL treatments in Los Angeles. Doxycycline and other antibiotics may make you photosensitive and thus IPL should be avoided while on the medicine. An exam will help decide if you are a candidate. Best, Dr. Karamanoukian Los Angeles

There shouldnt be a reason why you couldnt stay on treatment, but I suggest speaking to your physician and discussing this with him/her as each physician has their own protocols and procedures for the preoperative phase.  Best, Dr. Emer.