Can Intense Light In Appliance Be Used While On Tetracycline?

HI IAM CURRENTLY TAKING TETRACYCLINE ONCE A DAY AS I HAVE ACNE ON MY BACK, ONE OF THE SIDE EFFECTS ON THE INFORMATION LEAFLET STATES SENSITIVITY TO LIGHT,I DONT SEEM TO HAVE THAT SIDE EFFECT. BUT MY CONCERN IS THAT I AM THINKING OF BUYING A HAIR REDUCTION APPLIANCE WHICH IS USED WITH INTENSE PULSED LIGHT, ON THE ADVICE SHEET IT EXPLAINS THAT THE EQUIPMENT SHOULDNT BE USED IF YOUR TAKING TETRACYCLINE. WHAT IS THE WORST THING THAT COULD HAPPEN TO ME?