Using a long acting local anesthetic at the time of surgery and providing narcotic medications by mouth are routine methods for minimizing pain following a Tummy Tuck.
Most important in my experience is teaching you how to move, walk, get in and out of bed, and carry out your daily activities without stretching or pulling on your Tummy Tuck Incision. You will find that if you walk slightly bent at your waist, avoid quick motions to stand up straight, that you will minimize your discomfort. You will be taught how to "log roll" in and out of bed and out of a chair and preferably will have someone with you to assist you.
Careful attention to these positioning maneuvers is the most helpful way to control pain as the primary cause of discomfort after Tummy Tuck is postural pulling on the incision, and even an indwelling pain pump will not control pain caused by too much exertion, quick movements, or abruptly standing up straight.
If you rest and avoid quick movements that pull on your incision you will find that after 4-5 days you will be much more comfortable and by two weeks close to normal comfort.