There is no "magic pill" for some of the issues associated with massive obesity. One issue you can get is obstructive sleep apnea where you're so fat your tongue blocks your throat at night, and you can't breathe. This eventually leads to pulmonary hypertension and heart failure. You can "fix" this with a CPAP machine, but it's not pleasant. Another issue is that you can be so fat that your chest muscles aren't strong enough to allow you to breathe. There's no real fix for this other than losing weight.