HELLO ERIN, YES I HAVE A PUMP. I AM IN NJ SO IMPLANTED HERE. I HAVE A MEDTRONIC PUMP A WELL KNOWN MEDICAL COMPANY. PERHAPS YOU CAN SEE IF YOU LOOK THEM UP BEFORE YOU MAKE YOUR DECISION, IMPORTANT. THE PUMP IS THE SIZE OF A PACE MAKER IMPLANTED IN THE STOMACH AREA. IT DOES NOT INTERFERE WITH ANYTHING. CATHETER IMPLANTED NEAR THE TALE BONE, CAN'T FEEL IT AT ALL. EVERY MONTH I SEE MY PAIN MANAGEMENT/ANESTHESIOLOGIST. [RESEARCHING A DOCTOR IS VERY IMPORTANT!!!!!!!!!!!!!!!!!!!] EVERY MONTH MY DR. FILLS THE PUMP WITH MEDICATION FOR PAIN AND THAT IS GIVING YOU CAREFUL DOSES 24 HRS A DAY. THAN WHAT YOU WILL BE GIVEN SOMETHING LIKE A REMOTE, SMALL CALLED A BOLUS. THAT IS PROGRAMED FOR ME TO PRESS FOR AN EXTRA DOES IF NEEDED. IN MY CASE IM ALLOWED 7 TIMES A DAY. I ALSO TAKE 4 MG HYDROMORPHONE WISH I USE VERY CAREFULLY! DR. HAS STARTED ME ON NALTREXONE VERY VERY LOW DOSE IN A DROPPER. IT'S HAD TO EXPLAIN PERHAPS YOU CAN RESEARCH IT AND ASK YOUR DR. AS FAR AS THE PUMP GOES NOT A BIG SURGERY, SAME DAY. I HOPE THIS MAY HELP WITH YOUR DECISION.